Customer Ratings & Reviews

I have been using this in my truck since 2018. I like the quality of this over the Motorcraft. And it is actually less than a dollar more per quart the the Motorcraft full Synthetic.

Ran this oil in 03 Ford 7.3 and didn't touch the motor till 400,000 at 260,000 with my Duramax and haven't touched the motor. Love this oil

The best oil money can buy

My current truck (2006 lbz duramax) has had Amsoil since its first oil change. Oil has been changed every 25k miles and filter every 10k. At 247,000 miles truck is running strong with zero blow by and burns no oil between changes. My opinion Amsoil makes a great product!

Have been using Amzoil for over 19 years never a oil related problem. I use Amzoil products in everything that requires oil.

I have been using Amsoil 15-40 diesel oil in my 2007 Chevy Duramax since I purchased new in 2007. Never any issues, no oil consumption and easy cold weather start-up.

I use this in my Kubota diesel tractor in the winter months. Provides easy cold weather start up.

I have solely used this oil in my Dodge diesel truck for the last 20 years. Engine still runs like new. It is the only oil for me.

Great product i use amsoil in everything this specific oil i use in my M35A2 Kaiser jeep deuce and half 6×6 keeps engine clean less wear runs smoother great product

It lubricates

Best damn oil in the business. You can really tell the difference. After the oil change. My engines running smoother and quieter.

Great oil. Holds up well. Seems to keep everything running smooth. 160,000mi and no issues so far

Great oil even under extreme heat my oil pressure is still good 👍🏼

Amazing, bought this for my military house generator and i am glad I did! Great oil and products!

I have been driving my Cummings powered Dodge since 2013 and protect my engine with the best synthetic oil I can. AMSOIL is my choice.

I use this oil in my 86 Chevrolet G30 Highcube van with a 6.2 non-turbo engine and the oil pressure increased about 5 psi and oil consumption on long trips decreased. Also the oil drips have decreased, cutting down on floor clean up.

I can not give a review on any oil with very few miles on the vehicle I'm using it in. Get back to me in about !00,000 miles or about 6 or 7 years.

High quality oil at an affordable price, definitely recommend to my friends and family. Preferred customer program is awesome too!

This oil works great and I like getting it delivered

The oil more than meets expectations and being rated for 25k miles or 1 year is amazing on its own! Being that I drive this vehicle less than 6,000 miles a year, I guess I will be doing the annual oil change! So far, the motor seems to idle and run smoother and not stay in the high pressure state as long! I will definitely buy this again!