Customer Ratings & Reviews

I had ordered 15W40, I received 5W40 by mistake, I had to pay return shipping and even though I had asked them to exchange it, they refunded my money and I had to reorder what I originally ordered in the first place. Product great, customer service awful.

Great oil delivered fast

Best oil ever!

I switched to this oil from Shell Rotella and I can say that I love it. Reduced engine noise, better gas mileage, etc. It’s pricey but it’s worth it.

From the moment I transition to amsoil diesel oil, my engine's performance as be spectacular, its as if all it's lubrication needs has finally been met, thanks to diesel oil amsoil outstanding performance

Absolutely the best. Period.

Will be running in the truck until she rots into the ground.

Good product for a decent price.

Amsoil is #1!

I've been using amsoil in my new 6.7 Ford diesel for 2 years. I use it in all my trucks we average 9,500 miles a month a truck per month.

My product arrived fast. Instantly noticed a reduction in noise engine in my dodge Cummins. Runs smoother as well! Also put Amsoil synthetic oil in my 2006 Yamaha Rhino. Same great results!

This is a superior synthetic oil. Great for vehicles that are in extreme weather conditions and are used for heavy work.

Picked these up to top off crankcase oil when needed. Also prices are going up as well.

Switched from Rotella to Amsoil... so glad I did. Worth every cent!

Great oil and filter

Awesome oil

I recomended this product

I used Amsoil products since 1980 and have found them superior products.

I am amazed at how clean the oil stays now. Bought my 2004 Dodge Ram 5.9 used a few years ago, oil was black, I have put Max Duty in it since I bought it, now I can still see the dipstick through the oil at the next oil change interval and no oil usage, engine only has 82,000 miles though.

I have used Amsoil in all my vehicles for many years, the diesel oil is used in my 2009 Duramax is still going strong, no oil related problems.