Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)
  5W-30 Series 3000 Heavy-Duty Diesel Oil (HDD) Synthetic 5W30

Maximum Fuel Economy and Excellent Anti-Wear Protection. Engineered for pre-2007 diesel engines in on-road applications as well as all model year diesel engines in off-road applications. Also engineered for all gasoline engines recommending API SL specifications including turbo-charged vehicles. Provides superior wear protection and fuel efficiency.

Package sizes include:

Quart Bottle
1-Gallon Bottle
2.5-Gallon Bottle
30-Gallon Drum
55-Gallon Drum

Product Code: HDD • Brand: AMSOIL




MSDS Data Sheet

Product Details Tech Data Reviews & RatingRelated Videos

Product Applications
AMSOIL Series 3000 5W-30 Synthetic Heavy Duty Diesel Oil is recommended for diesel engines, gasoline engines and other applications that require any of the following specifications:

Product Application Specs

• API CI-4+, CI-4, CH-4, CF-2, CF, SL, SJ
• ACEA A3/B3, E2, E3, E5, E7
• Global DHD-1
• JASO DH-1
• Mack EO-M, EO-N
• DDC 93K214
• Caterpillar ECF-1-a, ECF-2
• Cummins CES 20076, 20077, 20078
• Volvo VDS-2, VDS-3 • MB 228.1, 228.3, 229.1
• MAN 271/3275
• MTU Type II

Product Description
AMSOIL Series 3000 5W-30 Synthetic Heavy Duty Diesel Oil delivers extraordinary lubrication in both diesel and gasoline engines found in commercial, fleet and personal vehicles. By combining the industry's premier synthetic technology with AMSOIL premium additives, AMSOIL Series 3000 exceeds the higher performance demands of modern engines, including those with turbochargers. It withstands the stress of higher heat, higher acid levels and excessive soot-loading found in exhaust gas recirculation (EGR)-equipped engines. AMSOIL Series 3000 5W-30 Synthetic Heavy Duty Diesel Oil consistently outperforms conventional and synthetic diesel oils for long-lasting performance and protection.

AMSOIL, the leader in automotive synthetic lubrication, produced the world's first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL, The First in Synthetics® to do the best job protecting your engine.

Extends Drain Intervals
AMSOIL Series 3000 Diesel Oil can extend drain intervals far beyond those recommended for conventional oils. Its unique synthetic formulation and long-drain additive system deliver maximum engine protection, cleanliness and performance over extended drain intervals, reducing vehicle maintenance and waste oil disposal costs.

Maximizes Fuel Economy
AMSOIL Series 3000 Diesel Oil is energy efficient for reduced fuel costs. Its low viscosity minimizes "drag" associated with high-viscosity oils, allowing the engine to operate more freely, maximizing power and fuel economy.

Maximum Protection Against Engine Wear
Even under high temperatures and pressures, AMSOIL Series 3000 Diesel Oil’s superior film strength and anti-wear additives help prevent metal-to-metal contact. AMSOIL Series 3000 reduces ring wear, cylinder bore polishing, oil consumption and valve train wear for improved engine life and lower maintenance costs.

Controls Soot Thickening and Wear
AMSOIL Series 3000 Diesel Oil is heavily fortified with detergent/dispersant additives and is naturally resistant to soot. It is designed to keep soot particles suspended independently and prevent them from attaching together to form larger, wear-causing particles. Viscosity increase is minimized and soot-related wear is controlled.

Reduces Oil Consumption and Emissions
AMSOIL Series 3000 Diesel Oil effectively reduces high-temperature volatility (evaporation), outperforming conventional oils. Because less oil vapor passes into the combustion chamber, oil consumption and emissions are reduced. Additionally, lower volatility helps AMSOIL Series 3000 Diesel Oil retain its viscosity after high-temperature service for continued dependable protection and excellent fuel economy.

Excels in Extreme Temperatures
AMSOIL Series 3000 Diesel Oil resists thermal (heat) breakdown, oxidation and sludge formation better than conventional oils. And unlike conventional petroleum oils, AMSOIL Series 3000 contains no wax. It stays fluid down to -50°C (-58°F) for improved cold-temperature oil flow, reduced bearing wear and easier starting.

Service Life
AMSOIL Series 3000 5W-30 Synthetic Heavy Duty Diesel Oil is recommended for extended drain intervals in unmodified, mechanically-sound vehicles or equipment as follows:

Diesel Engine Service

• Three times (3X) OEM* recommendation, not to exceed 50,000 miles/600 hours or one year, whichever comes first. Drain intervals may be extended further with oil analysis.

Gasoline Engine Service

• Normal Service — Up to 25,000 miles or one year, whichever comes first, or longer based on oil analysis.
• Severe Service — Up to 15,000 miles or one year, whichever comes first, or longer based on oil analysis.

*Operating conditions and drain intervals for severe and normal service are defined by the OEM. Refer to your owner’s manual.

Compatibility
AMSOIL Series 3000 5W-30 Synthetic Heavy Duty Diesel Oil is compatible with conventional and synthetic motor oils. Mixing AMSOIL motor oils with other oils, however, will shorten the oil life expectancy and reduce the performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed.

Aftermarket oil additives are not recommended for use with AMSOIL motor oils.

HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS).

Click here to view the MSDS Data Sheet for AMSOIL HDD.

Keep out of the reach of children. Don't pollute. Return used oil to collection centers.

TYPICAL TECHNICAL PROPERTIES
AMSOIL Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)
Kinematic Viscosity @ 100°C, cSt (ASTM D-445) 11.7
Kinematic Viscosity @ 40°C, cSt (ASTM D-445) 67.9
Viscosity Index (ASTM D-2270) 168
Cold Crank Simulator Apparent Viscosity @ -30°C, cP (ASTM D-5293) 4851
Pour Point °C (°F) (ASTM D-97) -50 (-58)
Flash Point °C (°F) (ASTM D-92) 226 (439)
Fire Point °C (°F) (ASTM D-92) 240 (464)
Noack Volatility (DIN 51581) 250°C for 1 hour, % weight loss 8.6
High Temperature/High Shear Viscosity, cP, 150°C, 1.0 x 106 s-1 (ASTM D-5481) 3.5
Four-Ball Wear Test (ASTM D-4172: 40kg, 75°C, 1200 rpm, 1 hr) Scar diameter, mm 0.35
Total Base Number 12.1

Diesel Power Challenge

Did this product meet your expectations?

(click on a star to rate)
Product Name: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)
Current Rating: 4.86 out of 5 stars
Total Votes: 51 vote(s)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Michael: space

Best Oil for my 7.3!

The ONLY oil i use in my 2002 F350 7.3 Powerstroke. I get 25,000 miles between oil changes!

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Flint: space

Good product

it's a good product but I don't like the gallon jug design. They're hard to pour.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Leslie: space

Have been using this oil for 15 years.

Have used this oil in my Duramax since it finally broke in at 70,000, I now have 255,000 on it and every oil test came with 50% oil life after 10,000. I do a lot of short trips along with really long trips towing.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Corey: space

Yes

Makes changes a snap in my duramax. The 2 1/2 gallon jug fills her to the top of the stick. Great product and easy to order too

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jeremy: space

I would buy this product again

2004 dodge Cummins Great oil Truck runs awsome

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Billy: space

i have bought this oil since 2005 and will continue

I have used amsoil in my 2003 dodge ram 3500 the oil, performs very well has always checked good with an oil analysis 222,000 miles without ant oil related problems towing horse trailers and now a 36ft 5th wheel

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Yaremchuk: space

Driver

Very good quality.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Kenneth: space

Best for Diesels.

Boatload of additive for Excellent TBN analysis between extended oil changes.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Brandon: space

Would buy over and over!!

Great oil. Love it so far!!

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Andrew: space

Great oil again!

I use this in my 98 Dodge Ram 2500HD with the 5.9L Cummins 24v engine. It's been great to the engine.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mike: space

Great motor oil for my 6.0 diesel.

This motor oil is used in my F250 work truck. I've been using it for around 130,000 miles

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Dennis: space

Motorhome oil

Great lube. Have used in gas and diesel motorhomes

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Joey: space

Marine 15w40 diesel oil

Great product. I have used this oil in this truck for 20 years. I find it runs as good as the day that I bought it.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by John: space

Recommend this to all Cummins owners

2004 Cummins 5.9 300000+ miles still has cross hatch in the cylinders

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ricky: space

Awesome oil

Awesome oil I run 10/30 in my 6.0 powerstroke so smooth and great

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jarrod: space

Great Oil!!!

I use this oil in my 2006 Duramax with 180,000 and my 2006 Mercruiser. Oil works great.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Terrance: space

Diesel Longevity.

I've used this product in my '98 Dodge 3500 Diesel 4x4 for 18 years. It has worked excellent for me the whole time. I've tried other products before I tried Amsoil and they failed excessive heat and caused my truck to clatter. Amsoil works flawlessly for extended drain interval and for storage. I plan to continue Amsoil products in the near and distant future exclusively.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Andy: space

The best oil on the market

This oil is amazing i change it every 20 miles i also picked up 3.5 mpg after 1st oil change 10 years ago love it and recommend to every gm diesel owner out there

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Sammy: space

Great products!

Been using AMSOIL for over 20 years. Great products!

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mike: space

Will always use this

I use it in my Chevy gas trucks one has over 307000 miles on it never been into it 5.3L LS

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ken: space

good product.

Great oil, I have been running this in my 2500 4x4 dodge diesel for 10 plus years. 302,000 miles on it. Also use it in my Kubota Tractor, run it for 15,000 miles per oil change, change oil filter at 7500. I have sent the oil to lab several times, after 15,000 miles running time, oil always comes back good, never breaks down, good product,

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Herbert: space

Always do.

I have gotten great results with the oil. Have gone 40,000 miles on my oil changes. And I am taking baby steps towards 100,000 miles and beyond.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Rob: space

Great

Freat

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Richard: space

I buy over and over again

I use in my 2001 F350 powerstroke on pull 35 ft 5th wheel.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Vipra: space

A full synthetic 15w40 CI4+

15w40 AME & a 15micron Donaldson P551018 for my annual oil/filter changes.

From Southern summers to Northern winters, UOA shows that this combo can't be beaten for my over fueled, compounded decathlete 12v Cummins.

Don't ever stop making this outstanding CI4+ oil.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Usgr: space

15/40 Marine Diesel oil

Been using since 2003 in Duramax. Handles all climates.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Easy: space

Will definitely only be using amsoil

Switched to amsoil in my 2006 f250 powerstroke. My truck now starts much better, and runs quieter and smoother!

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by JC: space

I will continue to use this product always.

I use this oil in my JD 4720, I am very happy with it, it serves my purpose for what I use it for.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Raney1999: space

Does the job !

Only oil I've ever used in my 6.7 Cummins for last 100k aside a rotella hear and there. Also use the amsoil oil filter. Works well together !

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Danny.W: space

Love using the diesel marine in my truck!

I've run Amsoil in my 05 Cummins 5.9 for around 200k. And I've used all the different diesel oils Amsoil has to offer from highest of performance to the eco price. But In my leaky 300k plus and climbing work diesel. the marine oil always comes out with just about as much as I put in 10k ago. And the others I would sometimes be up to 3Qt short when drained. Like it's gets so thin that it finds completely new ways to seep out !! But that why I like to order the heavier oil. Lastly my whole truck runs on Amsoil rears,difs,transfer and engine, and I strongly believe that Amsoil is the soul reason why my Cummins runs as good as it does at 310k miles!! Thanks for the spectrum or synthetic lubes to chose
from!! Two thumbs high from this guy!!

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Gary: space

Owner

It does not break down like other oils, doesn't get up, or foam up. Longer time between changes.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ddenham: space

F350 7.3 diesel.

Great product, been using this product for years.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Cope: space

This is the only oil I Trust in my Trucks

Amsoil heavy duty 15w-40 marine diesel oil has proven to me that it will protect my Cummins engines. I have older high mileage Dodge trucks that get driven on the highway, gravel roads in -15F cold and 100F heat and the lab results from my oil samples have continually came back great. At a minimum I put double the factory recommended mileage on this oil before changing, depending on driving conditions.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by ROLAND: space

I will keep using this product

Reduced engine noise (duramax)

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Cummins lover: space

Great product been using for many years!

I've been using Amsoil diesel and marine for many years I drive 200 miles a day in my Cummins in and out of petroleum refineries 6 to 7 days a week and I work my truck hard! Amsoil has never let me down! This is a great product

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jeff: space

Great product

I have been using Amsoil in my 2003 Chevy Duramax for its entire life with great results.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Tim: space

I continue to buy this oil

Been using in my 02 duramax since I bought it in 06 oil stays very clean never black like many diesels

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Charles: space

Great oil for boat

This 15w-40 Marine oil is all I use in both my 2001 300hp Mercruiser boat engines since 2011. Why you might ask? 1) Only oil that has shown to lubricate the turbo blades on my son's boat diesel super-charger.
2) When son's oil hose ruptured at full engine speed, repair mechanic stated that engine only survived due to the oil's lubrication properties.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Kerry: space

I would purchase this product again

We have been using this product in our 2004.5 Dodge diesel since 2010. The truck had 110K miles on it when we switched over and added the micro-filtration unit. We now have some 329K miles with about 120K miles of that amount while hauling commercial freight. Now back to my daily driver and still using this oil.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Chum: space

Awesome Oil!!!!!

Product is great. 8-10,000 miles between oil changes. Price is right. You might as well go with the best.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Matt: space

I will always use Amsoil

It helps my 7.3 powerstroke start better since the injectors are oil fired it will start when 0 degrees without being plugged in

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Flyoften: space

Great Oil

Oil is like a lot of things where the positive traits are hard to quantify. You just have to know it's good and working. I run it in a Ford 6.0 so it has to be good.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by LEXUSMAN: space

I WOULD BUY THIS PRODUCT AGAIN AND AGAIN

I'VE BEEN USING AMSOIL SINCE 2004 AND I JUST LOVE THESE PRODUCTS. IN MY OPINION AMSOIL IS THE BEST OIL OUT THERE NOTHING COMES EVEN CLOSE. I HAVE A 2002 TOYOTA SIENNA WITH 570.000 MILES YES YOU SAW IT RIGHT 570K MILES AND THAT THING JUST KEEPS ON GOING AND GOING, IT JUST DOESN'T WANT TO QUIT. STILL ORIGINAL ENGINE AND TRANSMISSION. PEOPLE TOLD ME TO GET RID OF IT BUT I TELL THEM IT'S NOT THE TIME YET IT STILL RUNS LIKE A CHAMP AND EVERYTHING IS WORKING ON IT. I USE AMSOIL PRODUCTS ON MY OTHER CARS AS WELL AND A FEW OF MY FRIENDS GOT HOOKED ONCE THEY TRY IT AND THEY NEVER WENT BACK TO THE OIL THEY USED TO USE. THANK YOU AMSOIL FOR YOUR GREAT PRODUCT, KEEP UP THIS AWESOME WORK AND I WISH THAT AMSOIL TO BE AROUND FOR THE NEXT 100 YEARS.

BEST WISHES AND GOD BLESS AMSOIL!!!! ISTVAN.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Donkey Boy: space

Truck&Tractor

All we use in all our truck&tractor,

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Me: space

Great product

I have been using this oil sense I bought my 07 Dodge Ram diesel new 12 years ago. I go 15k between oil changes. I'm glad I started using this Oil and the by-pass system when I did. I have 250k on my truck now and plan to go another 250k. Amsoil has been great every time I place an order as well.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Crowley: space

I use Amsoil in all my truck gear boxes and diffs

Have been using heavy duty diesel marine synthetic motor oil in my duramax work truck for last 70,000 miles. Seems to have superior protection and less breakdown under heavy loads and extreme conditions.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Marv: space

Great dependable Lubrication

Motor oil

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Bullwinkle 119: space

1989 305cid Chevy goes 351,000.

This vehicle I drove everyday for work. Change the amsoil 15-40 marine/ diesel every 7,000 to 9,000 miles. Chose the 15-40 because of the drastic temp changes in Texas. The transmission gave up motor still strong didn't want to put any money in it sold it to a friend. Amsoil is an amazing product. Well worth the money.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by M Grieshop: space

I use this oil all winter long

I run this oil all winter long,every winter

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Bigguns: space

7.3 diesel van

I use this oil in my 7.3 liter van for the fact that it does great in the cold weather that I get into. I travel a lot in the northern states and it always turn over.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Steve: space

Excellent for my needs

After taking professional training for oil analysis it occured to me this was a suitable option. I have a diesel truck that gets infrequent use and having a 14 tbn gives me comfort in fighting acidity while in storage.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by ShovelJockey: space

Quieter 7.3 Hoping for excellent analysis

I've got a strong running 7.3 with 292,000+ on the clock. Have been using another oil with excellent UOA reports and getting close to 10k on oil changes. Decided a while back it was time to see what this Marine Amsoil was all about. Immediately noticed my injectors were much, much quieter. Will be sending a sample in for testing in about 2000 miles and see how things compare.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Roy: space

Best heavy duty oil for cold climates

I use this in my turbocharged Subaru during the cold months. It has loads of zinc and phosphorus so it protects the turbo, and its high viscosity index provides great cold start protection as well as high temperature protection in the turbo bearings. My motor and turbo have over 80,000 miles on them and are still running like new.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Reree: space

Love it!

Does what it says it does, went from running my oil from 5,000 miles to 20,000 miles. Saves money and time , engine temp runs cooler when under a heavy tow going up a grade, oil doesn't smell burnt when doing a change easier start up in cold whether with not having the truck plugged in. Extremely satisfied with this product!

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Eric: space

Yes

I change oil every 15k and I think is still good. 350 ml Bluetec

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Marmon: space

Happy with products

Has improved the performance , better fuel economy ,easier starting saves money from not having to change oil.I also use cetane boost and injector cleaner

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by speedy: space

I would buy this product again.

I feel that it is a superior product.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jack: space

I have this oil to thank for my Dodge Cummins long life.

I run an Amsoil bypass filter system and I am religious about changing filters and doing oil analysis. My old "rig" has always started well in winter and I only have to add oil when I change my filters.
I have only changed my oil 4 times in the 17 years I've owned her. I would recommend all Amsoil products I have used.

Thanks to you all from me and my truck for helping us keep on keeping on.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ted: space

Bought for winter use.

Works good when dealing with interior
Alaska weather of - 40 degrees.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Randy: space

Definetly buy again

I use amsoil in everything I own! Works great in my 06 duramax,01 powerstroke and Canam defender side by side. Peace of mind for sure!!

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mark: space

I only use this oil

I use this oil for my 1999 Ford F250 7.3 liter diesel. This oil has very good longevity. For a diesel I change this oil about every 10,000 miles. It cuts down on oil change intervals. I am sure it could go much longer.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mr. Fix it: space

Best oil on the market

I have been using this oil in my Sequoia, Continental, and motorhome for 15 years. Tell me what other oil lasts 25 k in a gas engine?

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Derek: space

Series 3000

I cannot say enough about this oil. My truck starts easier, runs better, and probably gets better fuel economy. I "push" Amsoil on all my friends because I believe in it so much.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Spotted puppy: space

Big Red

Amsoil is the only oil, grease and lubes that have been used in our 2001 F-250. It now has 210,000 miles with no use of any oil. This is our second diesel truck that we have use only amsoil. The other truck had 300,000 when we sold it. It did not use any oil either.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Master Craft: space

This is the best oil ever!

I use this oil in my Master Craft boats and it keeps them working perfectly year after year after year.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Machineman: space

Diesel oil

Have used this oil for years, would not use anything else in my diesel truck

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Daniel: space

Diesel Marine Oil 15W-40

I've used AMSOIL products for years. I have an 2004 F350, 6.0 liter and this is the only oil I run. Amsoil keeps the engine clean and long lasting. Also use AMSOIL in my 2007 Expedition. Both vehicles have close to 200,000 or more than. Still running strong.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Chris: space

Always use this product

Run these fluids in all vehicles

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Barry: space

THE ONLY oil to use

My diesel will use nothing else!

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Tw: space

First product I've tried results look promising

Daily driver ,200000+ miles runs like new

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Whododgeit: space

I would buy products again

It great oil and keep engine running life

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by ron: space

amzoil.15/40.diesel

1995.dodge.2500.12.valve.5/9.cummings.diesel.only.500.miles.since.change.have.notice.better.fuel.efficiency

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Buck: space

Very pleaded with purchase

Works perfectly

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by L. Williams: space

The value of a Classic.

Greetings,

I have a 2001 Hummer H1 and I recently 'rescued' a 1995 Hummer H1. Now, both of these vehicles are
getting closer to the Classic status. I am bringing the 1995 back to life. I have changed the diff oil, hub oil, engine oil, trans oil, and coolant with Amsoil. The 1995 is running strong now.

I take the vehicles out in the wilderness. I see no reason to risk my family getting stranded by using a cheap/sub-standard product.

Adventure on!

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by LBZ Duramax: space

Excellent product!

I've been using Amsoil 15W-40 Heavy-duty Diesel and marine oil in my 2006 Silverado 2500HD for 10 years now. Oil and filter change intervals average around 12,000 to 18,000 miles.
The truck now has over 355,000 miles on it and it still runs great! I never have to add any oil between oil changes either. If you are on the fence about using this oil in your vehicle, I say, go for it! You won't regret it!
Amsoil is top of the line!

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jason: space

15W40 Heavy Duty Diesel Oil

I have an 06 Dodge with the Cummins. These 'older' diesels required a CI4+ oil. There is much debate in the oil world about the qualities of the newer oils vs the older ones - specifically that the old CI4+ oils had more detergents in them, which the older engines liked better. Even though the newer oils are backwards compatible, they apparently do not have the same detergents in them. This has been the only CI4+ rated oil I can still find. Its the only oil I use in the Cummins.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mr Diesel: space

15w40 he diesel oil

Used this oil for 27 years and never had a oil leak or any engine failure. Put 300,000 miles on Dodge TURBO Cummins, check but never had to adjust valves. Only oil I will use.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Eric: space

Awesome

Been using this on 7.3 heui truck oil shearing monsters. I'm at 9k and been pushed to 15k for next oil analysis definitely a efficient product and same $$$$ on oil changes..

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by chin00kie: space

The best oil.

I maintain seven vehicles so changing oil could be a full time job. I use Amsoil because it is the best oil made and the best filter in the industry. My twin sons just became 16. For their birthday I had them learn how to change the oil in their trucks by converting them to Amsoil . This oil seems to be better suited to my older VW Jetta than the other Diesel oils. I use less of this oil. My car has nearly 300,000 miles and has always used about 4 oz of oil every 500 miles. With this oil that amount is cut in half.

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mark: space

I use this product in my Dodge diesel and my boat

I also use the motorcycle kit for oil and filter changes in my Harley Davidson

Item Reviewed: Heavy Duty Diesel & Marine Motor Oils

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Custom ROD: space

Hard to Choose

I never really know if I'm choosing the best product for my applacation. Wish
I could call my friends at Amsoil like they do a Roadkill Garage

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jeff in Southern Oregon: space

Excellent Oil=Long running pickup!

I have a 2005 Dodge 3500 with a 5.9L diesel. From the first time I changed the oil or had it changed, I have been using Amsoil 5w-30 with the Amsoil Filter. The truck now has over 435,000 miles and just keeps going! I do a lot of Freeway driving all across the West, sometimes pulling a stock trailer. Amsoil products keeps it going. I average about 25-28 MPG, and do about 35K-40K miles per year. Thanks for keeping me on the road!

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Thundercat: space

Perfect winter oil

This is my winter oil for my 1998 Dodge Ram 5.9L diesel. Use this oil with my Amsoil bypass system.....change to it in November (from 15-40). Have been using this as winter oil for many years with absolutely no issues, truck starts well whether plugged in or not.

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mike: space

Good oil!

Was having some stiction issues with my 7.3. Was recommended this product by an oil specialist. Never heard of Amsoil before I used it. Seemed like my engine loved it as I could tell that it started right up and seems to have restored any loss of power. Stiction seems to have gone away even in cold start ups. Will exclusively use this product.

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Wounded Knee: space

GREAT product!!

This review is based on a van that I no longer have. I used Series 3000 in that van for years... I believe 3 years?? Perhaps 4. At the time that it suffered a rollover and was "totaled", the engine oil pressure (a major indicator of bearing wear) was exactly as high as when the van was new to me.

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Bob: space

Excellent Oil

I've been using Series 3000 5w-30 in my 2005 Ram 2500 with Cummins engine for 5 years now. I change it once a year, every 20,000 miles (without sampling...vlimd faith). Truck had 140k miles when I bought it and first put in Amsoil....it now has 240k and runs perfectly. I will always use Series 3000.

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Peter the treat: space

Excellent product!!

16 plus years in gas and diesel engines, no regrets!!

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Bow hunter Matt: space

I will keep buying this everytime I change my oil

The only oil I have ever used that frees up extra horsepower

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Sonny: space

I believe in Amsoil products

I have been using Amsoil lubrication in all of my cars, trucks, tractors and compressors since 1974. I am very happy with the results I have had with Amsoil - higher mileage, better cooling due to less friction and longer oil change schedule.

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Wil: space

Only the best!

I've used Amsoil for over 40 yrs. starting with my 1st VW diesel around 1973 and never had a worry.

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jack: space

Jack Sandow, CEO, "Aquatic Research South", Waycross, GA

I wouldn't crank up my 2001 Powerstroke 7.3 diesel without Series 3000 in the crankcase !! It's amazing protection, and allows me to only change oil when needed. The auxillary remote filtration system I purchased from Amsoil allows me years of worry-free protection !!!! NOTHING better !!!!

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jack: space

Jack Sandow, CEO, "Aquatic Research South", Waycross, GA

I wouldn't crank up my 2001 Powerstroke 7.3 diesel without Series 3000 in the crankcase !! It's amazing protection, and allows me to only change oil when needed. The auxillary remote filtration system I purchased from Amsoil allows me years of worry-free protection !!!! NOTHING better !!!!

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by MATT: space

Series 3000 5W-30 Heavy Duty Diesel oil

I've been using using this product in my 2001 Ford Excursion 7.3L Diesel. Change every 15,000 miles . 288,000 miles so far ! High pressure oil actuates the fuel injectors on this engine. Still on original injectors. I believe the full synthetic oil has helped extend the life of the injectors. Several of my friends have had to replace their injectors on similar Ford diesels. Looking to put 500k miles on my Excursion. Amsoil products in transmission and rear end as well.

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Scott: space

improved fuel economy

Since i have used this product i have noticed improved fuel economy in my 3.0 diesel engine. This product has a very high film strength and good lubricity. I will watch the performance as time passes..

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by TN: space

Series 3000 5W-30 for the 6.0 Powerstroke engine

I have experienced quite a few problems with the 6.0 Powerstroke engines and I can say that my 6.0 runs like a top after switching to this oil. As far as I am concerned this is the only oil that I will ever put back into this machine - it has made a noticeable difference, especially in cold weather. I was skeptical at first but this oil was made with the 6.0 in mind. The standard 15w-40 oils tend to get sheared down by the High Pressure Oil Pump meaning they are 15W-40 when you put it in the engine but it is not 15W-40 when it comes back out. Where the Series 3000 oil goes in at 5W-30 and comes out at 5W-30.

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by COL DAVE: space

Series 3000 5W-30 Synthetic Heavy Duty Diesel Oil

I have been using this oil for over 5 years now and I would not change for any other brand. Amsoil is easy to work with and they ship fast. Great company.

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by DON'T HAVE ONE: space

180,000 miles with Amsoil series 3000

I BOUGHT A USED 2007 DODGE DURANGO LIMITED WITH A 4.5 L GAS ENGINE IN 2007. IT HAD 18,000 MILES ON IT AND NOW HAS 190,000 MILES. I HAVE USED THE SERIES 2000 OIL ITS ENTIRE LIFE, CHANGING EVERY 10,000 MILES. IT DOES NOT USE ANY OIL IN A 10,000 MILE INCREMENT.

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by JP: space

Chevy diesel

I have used this product for years. I keep my vehicles for many years so important to keep wear under control. When my trucks hit 45000 miles I switch to Amsoil 3000 and have gotten longevity on all with no major engine trouble. Never had to plug my vehicles in, in cold weather. And I've had to travel upstate NY in very cold weather.

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)

Reviewed by Chip: space

update after 9k miles

Utterly boring, reliable oil. 12 quarts + EaO80 filter + 9.1k miles = no oil burned + analysis came out excellent :-)

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)
Discussion Url

Re: update after 9k miles

Chip, thank you for confirming the outstanding performance of Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil, and that it provides the driver the security of knowing their engine is going to provide trouble-free operation mile after mile. Based on the oil analysis, it is still fit for use. Replied by Tech Admin

Reviewed by Chip : space

excellent oil

I'm lazy - changed the main bearings this morning with the crank still in place. Along with a new oil pump, oil pickup, 6 quarts HDD + EaO15, I'm good for at least a year.

Low temp flow/longlife like ATM, and Zn/Ph/bearing protection/film strength/high temp stability like ZRT/Dominator, this oil is a winner, and personally recommended by Alex Farkas.
I hear the founder of AMSOIL uses this too.

"The HDD has a higher level of ester content, a higher Base Number Detergent/Dispersant package, and two new FM/AW components; one an ester and the other an organometallic compound."

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)
Discussion Url

Reviewed by Ryan Scott: space

the best multipurpose oil

With some research I found out that series 3000 is a very high end oil in terms of what goes into it (read robust additive package).

Also this is the only oil that can be used in virtually any application (diesel, gas & propane) that requires 30 or 40 weight oils (like 5w30, 10w40 etc).

This one drum replaced various grades of oils in the farm. No more confusion. One oil goes into all farm equipments... small engines to diesel tractors. Supports extended drain interval for up to 1 year. Amsoil HDD provides excellent performance, protection & convenience. A total time saver. Hope Amsoil keep making this oil.

Item Reviewed: Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil (HDD)
Discussion Url

Re: the best multipurpose oil

Hi Ryan, series 3000 HDD is a high performance, multipurpose oil, excellent for a wide range of older & off road vehicles and equipments (gas & diesel) but it is not suitable for 2007 & up diesels equipped with diesel particulate filter (use a CJ-4 spec Amsoil).

Also do not use HDD on modern vehicles that require oils with certain specs (as described by the manufacturer), which HDD may not cover. Replied by Tech Admin
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