Customer Ratings & Reviews

I like the fact that I change it only once a year!

We have been using this oil in our diesels for over 8 years and it has never let me down. We had a fleet of 150 gensets and 50 semis. Not once did we have an engine failure due to lubrication qualities with this oil. Our engines in the gensets lasted 26,000 hrs before we would pull them out of service to rebuild. I have used this oil in my personal diesel pickups and have never been disappointed. I will run this oil for life.

We have a diesel Pusher motorhome and since using this product I figure my engine (Cummins) runs smoother and cooler, along with the extended mileage, it is a no brainer for performance and cost savings overmore frequent oil changes. I installing a By Pass filter to clean the oil even more than the stock filter does, My coach has a Allison Transmission so that gets the 'TORQUE DRIVE " Synthetic oil and the rear end has the 80/140 oil too. Nothing but the best for us for sure.

Chev duramax des

Use it on both of my 7.3s love it

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.

Are used this product on four different trucks since 2007 to my current 2016 Duramax diesel I would not use any other oil

I am so thankful that Amsoil still makes this oil. I use it in my diesel farm equipment and truck that I don't want to use the disasterous CJ class of oils!!! Thank you Amsoil!

Get a lot more mile from this oil.

Tractor

this motor oil ,i got no comment to say ,the fluid is great, the antiwear formulars that is blended in is good and it do not burn within oil change inteval,i normally replace every 20,000 to 25000 miles on the ram with the 6.7 diesel.

Been using this oil since I have had 25,000 miles on my 05 duramax now have 128,000 plus miles and it still going strong. Now I don't put as many miles on the truck and I only have to change the oil once a year. Also use AMSOIL filters.

I change my oil every 10-20k in my 99 cummins. Its still gold in colour after 5k.i proudly show everyone

I pull a 38 ft 5th wheel. The oil gives me the extra miles I wanted between oil changes. I have Gained over a mile per gallon in millage after switching to AMSOIL

Use in my work truck that is constantly pulling equipment .

Duramax diesel

Put in an 07 duramax fully deleted great Put In a 13 duramax fully deleted typewriter ticks slightly Put in a 2015 duramax fully deleted typewriter ticks really bad

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.

Recommended by a friend, I have purchased this product since I bought my 2004 Dodge Heavy Duty. Still runs great. I run Donaldson oil filter.

I use Amsoil products in all my vehicles