Customer Ratings & Reviews

I broke my 2003 duramax in and switched to Amsoil 15-40 and now have over 800,000kms on it with out ever removing the valve covers and it is still running strong

I have a lifted 2014 ram 2500. since I start using amsoil it runs smoother and quieter for longer. I 100% recommend them

Ordering from AMSOIL is always super fast shipping and the best quality of oil out there. I run it in all my Vehicles which is including my 18 turbo RZR and my built Harley.

What can possibly be better than Amsoil? If you could eat this product, I would have it for breakfast daily!

Been good oil for me but it’s the 2nd time I’ve got the wrong filter that I ordered. I quit ordering for this reason because I live far out. Had to go buy a new filter again and now I this one that doesn’t fit.

Been running this oil from new purchase 2016 of truck

Great oil for my 2017 F250 6.7 diesel.. gear boxes an tranny next.

This is the best oil out there! I won’t use anything but amsoil product in my truck and car

I like Amsoil's quality and their constant testing.

We go 8000 mi. Between oil change now

Like the title says great oil, and it was in stock when I ordered it, and arrived with in a week of ordering. Planned on changing to Amsoil, and when the stores supply of the other brand I had used I changed.

I have your products in racing with great success. The diesel oil is for my wife’s truck which she makes trips to Tennessee, Missouri,Kentucky,& Texas pulling a43 ft horse trailer I like make sure things are protected the best way possible I believe Amsoil does that.

Best oil on the market! You can actually feel the difference when you put some between your finger tips. I trust this oil in my '96 Powerstroke for a year at a time. (I don't put a lot of miles on it in a year).

The easy pack seal is very hard to open, and a pain in the but, the seal on top is not easy to open, first I tried to pull on the tab, could not open seal, then I got pliers, ripped the tab off trying to open, then I used my pocket knife, poked a hole in the seal, then used pliers to tear it off…..holy crap….that needs change, the oil I have no complaints about….excellent oil.

1990 Jeep YJ 4.2 I run 5w-40 (winter) 5w-50 (summer) NJ I was a Rotella user for years. This engine needs dino oil because of its high zinc content. Amsoil Diesel oil is just plain better imo. Cold starts are quieter. This motor has been bored & stroked to 4.7ci with a mild comp cam. I have higher oil pressure at idle and at speed than Rotella. 10 more psi at 55mph. and around 5-7 psi increase over Rotella at idle. Gas mileage has improved as well. The motor just seems to run smother. I was hesitant to switch but I'm glad I did. Sorry Rotella. But the improvement from Amsoil is obvious. Thank you Amsoil.

Always use Amsoil in my diesel truck, tractor, cars, small engines , and air compressors. Nothing better.

Really great for my 1-ton Ram.....

I’ve been using in my Ram EcoDiesel for 115,000 miles. SeemS to be working well time will tell!

I've used this same oil for 900k, I have amsoil in everything, don't leave home without it

Awesome oil