Customer Ratings & Reviews

Love the AMS oil difference! My oil temps run a few degrees cooler when towing in this hot summer sun! Thanks AMS

I noticed on the Amsoil website when you add your make and model truck and your address it will automatically put the exact product for your vehicle in front of you. I have a 2021 Ram with the 6.7 Cummins that has the hydraulic lifters that are oil specific and I live in Oregon with more temperatures and the website put the 10W-30 that is the preferred oil grade by Cummins for the 6.7 with hydraulic lifters in my climate and how many parts counters are going to do that or let you walk out with 15-40. I have zero problem paying more for better oil in a vehicle that I you invest 80 to a 100K into.

Very fast service and great product

Very happy with this diesel 10w30 stays clean longer better oil pressure fuel mileage is better engine seems happy.

This oil is top quality and based on test that I have read, it out performs other oil in engine protection.

I have not come across any AMSOIL products that haven’t lived up to their promises. The one pretty big thing is they are expensive, I wish they could offer a better discount for their preferred customers.

I run this year around in my 2016 Ford F350. It's a much better quality than OEM Motorcraft Synthetic and the cost difference is only a dollar or so per quart.

I heard about this product from a friend who had 2 trucks make it past 500k miles. I did my research and order kits for all 3 vehicles. I am happy with the cost and longevity of the product. I have been suggesting it to anyone that will listen.

Been running rotella for months, switched, and will never turn back.

i have used amsoil for 20+ years. this is the first diesel engine i have used it in. from the first crank up the idle has been smoother with a noticeable uptick in power. looking forward to many years of service from this equipment.

Best oil in the market been using it in my 2026 chevy Silverado Duramax 6.6 since new A++++++

Switched to Amsoil after the positive results on the YouTube channel, Project Farm. My 2021 Denali 2500HD pulls a travel trailer with a combined weight of 19,000 lbs. At 80 years old, it's probably going to be my last truck and I want it to last. I had a Banks oil pan and differential cover installed. Both using Amsoil.

I haven't been driving the diesel because of fuel cost. I recently put Amsoil in my mini truck, it seems like everything is working as it should. My next motorcycle oil change will be with Amsoil. I ride the motorcycle all the time.

I use Amsoil in everything I own.

I have been using faithfully for over 13 years and my trusted oil for extended intervals! Gives me improved performance and economy on my Duramax diesel! Also do regular oil sample testing with excellent results! Will continue using on regular basis!

This is best diesel engine oil out there. I use it in my TYM 4820R Tractor.

This is the only oil I have used in my Ram 2500 and when the injectors were replaced at 300,000 mile, the engine looks like it was brand new inside.

Not happy. The box was in terrible condition. A couple of oil bottle were caved in I was supposed to receive tire pressure to check tire pressure. NOPE. After all these years I am totally upset. This may be the last time.

Great product at a great price. Definitely recommend driving in all kinds of conditions

I’ve been using AMSOIL now for about 20k miles and it’s great. Only problem is that the only filters ever available are the junk Wix filters. I tried it a couple times and am not impressed. The AMSOIL filters are much better but haven’t been in stock the last 3 times I’ve ordered oil. Hopefully the supply issues are resolved soon.