Customer Ratings & Reviews

I’ve tried others but none performed as well as Amsoil in my 12 valve Cummins. The truck has 265k miles on it and Amsoil stays clean longer and reduces oil consumption over the oil change interval.

I have been using this oil for 3 years and I love it no problem the motor sounds different and performs better.

I just started traveling full time pulling a 5th wheel. I wanted to use a good oil so in my research determined Amsoil was one of the best Synthetic Oils I could buy. So I’m giving it a try. My truck has 212,000 miles and I’ve had no problems but with those miles I wanted something better than average to protect my engine so I went with the Amsoil.

Amsoil definitely makes the best oil on the market and has the test data to prove it. I use their oil, filters and fuel additives in both my vehicles. Their diesel fuel additive cut the regen frequency by more than half on my 2020 duramax. Highly recommend all amsoil products.

Works very well, used to use a different Amsoil product switched to this for the added wear protection and the extended drain intervals

This is the only product I use in my super duty 6.7L

Great product been using it for years on my 6.7 cummins. The best

The truck seems to run and sound better. MPG has increased 10%. I'm also running the all in one.

I have been using Amsoil for several years and have recommended it to other people that are extremely pleased with this product, we will continue to use Amsoil products and are pleased with the performance from Amsoil products, thanks Amsoil.

If you use your truck as a truck and not a grocery getter this is the oil I would recommend. This oil holds up good under heavy towing a cool off times. The lower grade heavy duty started breaking down very fast and only got about 10k miles on it before I noticed oil pressure fluctuations , but this max duty is much better for higher temps and hard working trucks.

I feel, and most of my friends feel the AMSOIL IS the finest oil on the market. I guess it is what you could call a reference oil, an oil that every other oil manufacturer strives to be like. I've used them all but I have come to trust only AMSOIL. I use their products in all of my vehicles and machinery both diesel and gas, oh....and also my guns.

Great oil! Switched my 2009 Peterbilt with the ISX Cummins from mobil delvac 15w-40 to this. Noticed right away that I had less vibration from the engine while sitting in the cab. The oil stays cleaner longer also. I also started running this in my 2008 Silverado 3500 with the Duramax.

The oil I requested for my 2014 Ram/ 6.7 was delivered on time and well packed with no damage . This is the second time I’ve purchased from AMSOIL and will continue in the future . Highly recommend them !

The product speaks for itself

I was fortunate to grow up around Amsoil and the benefits of using it I wouldn't use anything else it's the best oil hands down!