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!

I’m an 100% AMSOIL user I would not use anything but from my lawnmower to all vehicles and farm equipment

We have swapped to AMSOIL AMSOIL Signature Series 15W-40 100% Synthetic Max-Duty Diesel Oil which appears to be the best product on the market. The purchasing process and speed of delivery make AMSOIL a must buy product we will trust AMSOIL products in all of our equipment and vehicles.

I think this honestly may be the best oil ever for Cummins OTR trucks.

Good oil

Only have approximately 4K miles on the oil. Appears to still be consistent. Added a bypass system at same time. Waiting to reach 15K miles and send in sample for testing. Will follow up

Bought this for my tractor after reading reviews and comparisons. My equipment is expensive, so I want the best in it. I'm told this is it. So far , so good.

I use the 15-40 signature series in my RV with a 12.8 liter Mercedes Diesel. I noticed a difference on my way home from having the first oil change with the Amsoil. On our first trip my wife ask what I had changed. She said "the engine is quieter and smoother". Now it's the only oil I'll use. Thank you for a great product.

Oil should work great but was disappointed they did not have my oil filter in stock. I really want to shop for everything at one spot.