Have been running in 04 duramax 3/4 ton for 100,000 miles with regular oil change intervals between every 3500 to 5000 miles in a work truck that has towed heavy loads or been under stress for most of its life. Switched to synthetic amsoil at 65,000 miles in engine, plus transmission and all the boxes. Has 179,000 + miles on it now and is still running and working strong. I believe the amsoil and regular oil change intervals has made a difference in the longevity of trucks power train components.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
The... best oil for pre Anniston
By 
Anonymous, 
a 
Verified Buyer 
on 
October 15, 2020
I recommend AmsOil products all the time to friends and family. Well worth the investment.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Good product
By 
Flint, 
a 
Verified Buyer 
on 
October 17, 2019
it's a good product but I don't like the gallon jug design. They're hard to pour.
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5 star rating
Have been using this oil for 15 years.
By 
Leslie, 
a 
Verified Buyer 
on 
October 16, 2019
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.
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5 star rating
Yes
By 
Corey, 
a 
Verified Buyer 
on 
October 10, 2019
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
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5 star rating
i have bought this oil since 2005 and will continue
By 
Billy, 
a 
Verified Buyer 
on 
October 08, 2019
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
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5 star rating
Driver
By 
Yaremchuk, 
a 
Verified Buyer 
on 
October 07, 2019
Very good quality.
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5 star rating
Best for Diesels.
By 
Kenneth, 
a 
Verified Buyer 
on 
October 04, 2019
Boatload of additive for Excellent TBN analysis between extended oil changes.
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5 star rating
Great oil again!
By 
Andrew, 
a 
Verified Buyer 
on 
September 30, 2019
I use this in my 98 Dodge Ram 2500HD with the 5.9L Cummins 24v engine. It's been great to the engine.
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5 star rating
Great motor oil for my 6.0 diesel.
By 
Mike, 
a 
Verified Buyer 
on 
September 25, 2019
This motor oil is used in my F250 work truck. I've been using it for around 130,000 miles
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5 star rating
Motorhome oil
By 
Dennis, 
a 
Verified Buyer 
on 
September 23, 2019
Great lube. Have used in gas and diesel motorhomes
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5 star rating
Marine 15w40 diesel oil
By 
Joey, 
a 
Verified Buyer 
on 
September 22, 2019
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.
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5 star rating
Recommend this to all Cummins owners
By 
John, 
a 
Verified Buyer 
on 
September 22, 2019
2004 Cummins 5.9 300000+ miles still has cross hatch in the cylinders
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5 star rating
Great Oil!!!
By 
Jarrod, 
a 
Verified Buyer 
on 
September 09, 2019
I use this oil in my 2006 Duramax with 180,000 and my 2006 Mercruiser. Oil works great.
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5 star rating
Will always use this
By 
Mike, 
a 
Verified Buyer 
on 
July 17, 2019
I use it in my Chevy gas trucks one has over 307000 miles on it never been into it 5.3L LS
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5 star rating
good product.
By 
Ken, 
a 
Verified Buyer 
on 
July 16, 2019
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,
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5 star rating
Always do.
By 
Herbert, 
a 
Verified Buyer 
on 
July 04, 2019
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.
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5 star rating
Great
By 
Rob, 
a 
Verified Buyer 
on 
June 26, 2019
Freat
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5 star rating
I buy over and over again
By 
Richard, 
a 
Verified Buyer 
on 
June 22, 2019
I use in my 2001 F350 powerstroke on pull 35 ft 5th wheel.
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