Amazing oil. My engine is quieter than before. Better fuel mileage. Engine temp is 5 degree's lower. Amsoil once again knocks it out of the park. Great oil!!

Love Amsoil products. You cannot beat the quality of these products!!

Best oil for Diesel engine

This is the second oil change that I have used this oil. I really like this oil! It seems to preform better than to other brand of Oil that I was using. It seems to hold better Oil Pressure than my previous Oil. I have become a Amsoil Customer for Life!

Never an issue. Great product.

my diesel farm tractor starts easily in very cold weather in michigan during the winter for clearing snow and pulling tree's out of the woods for firewood business. highly recommend it.

Very easy to order online. I did have concern about the oil being acceptable in my Cummins 6.7L Diesel. CK4 but not Mopar MS 10902. The owners manual stipulates both. But Cummins CES 20081 is acceptable. I inquired Amsoil and they stated they will be changing the label in the oil to reflect its acceptable for this engine for 10W30. Great technical response!!

the best oil for my tractor

I use this oil in my Kubota tractor From my Experience it keeps the engine running clean and adds to easy start ups in the cold weather

Great product might be pricey but you get what you pay and I'd rather pay the money and have the best in my vehicles than have some cheap stuff tjat won't last

The day I bought home my Massey Ferguson tractor I dumped the stock oil and refilled with Amzoil and a new filter. That was 8 years ago, and it still runs like a champ, and it burns less than 1/4 Qt. every year. I don't use anything but Amzoil , it's the best.

My 2009 Ram 2500 had 180000 miles when I sold it. No blow by, like new compression , no engine problems using Amsoil. Buy a cheap vehicle and use cheap oil. I’ll buy the best for my Cummins engine.

I use Amsoil products in all of my vehicles air cooled and water cooled. I live in Texas and sometimes the operating temperatures are excruciating. Tests that I’ve seen with my own eyes prove that I am soil is far and away the best oil product on the market for battling friction and heat. I have a better peace of mind knowing that my vehicles are protected by Anzola products, and I love it when these vehicles are torn down for mods, they are clean and unharmed. Its a great product and well worth the cost.

Best stuff around liquid gold

Noticeably smoother motor as soon as you add this stuff. Less vibration at idle for sure. I use this in my 2020 Ram 2500 Diesel and use Ams products in my 2020 Polaris Ranger. Highly recommended.

I finally got to get the oil into my truck. I have noticed that I have better oil pressure with this oil than the old Oil I used. Too early to tell the long term effects yet.

The AMSOIL Signature Series oil along with the by-pass oil filter is an unbeatable combination.

This will be a great oil to keep my Cummins happy for years. Price and availability beat the competitors and testing data shows this will be just what is needed for my truck.

Noticed a boost in fuel mileage, 1.5 per gallon. Seems to run quieter especially at idle.

Based on the studies and Video done by Banks Engineering, I believe this oil protecting my engine better than my prior brand. Its cold temperature performance was what i was looking for. I have not seen any changes in mileage.