Customer Ratings & Reviews

Best oil you can buy.

Flows well for easy starts in cold weather, no oil consumption between drain intervals.

I have a 2018 GMC duramax and to protect this engine amsoil was my choice. Protection is critical for these engines allowing them to outlast other diesel engines.

Love this oil. I use Amsoil for everything on the ranch. Consistent quality for all of my engines.

Switching to Amsoil in my 2003 Dodge Ram Cummins, was a great decision. This truck had 230,000 miles on the clock. It runs quieter, mileage gained and feels like it has more power. Highly recommend it.

Awesome products plus fast shipping. Keep up the good work!

Never had a better product I've used synthecs for year's when I was in the US NAVY back in the 80's as a machinist it was mandatory schooling for oils education AMZOIL is the WORLD'S BEST PRODUCT EVER

This summer I tower a 24 foot enclosed trail loaded heavy with trencher, zero turn mower, Kubota RTV, and much more to Montana and back to Texas ending with over 8k miles the engine performed great and ran cool throughout the trip. I recommend this oil for those having to tow long and hard.

Runs / Start faster / Runs cooler

Excellent

Great oil!!! It does really well with temperatures. It maintains its additives and its viscosity really well. Very good oil sample results using this oil. My car has currently 348,000miles and still running strong. I have been using amsoil for all my oil changes. Amazing oil and results.

Very satisfied with this product, I highly recommend it !!!

I've been using Amsoil signature oil in all my vehicles for years and just switch from another Synethic oil that the dealer used in my 6.7 Cummins. It has excellent oil properties and provides excellent lubrication under extreme -25c weather up tp 40c we experienced in summer hauling. For my money it provides that extra assurance and piece of mind.

My engine was the first component on my new 2020 Ford F450 that got changed out to Amsoil. I do my own service work and when I finished the oil change including the Amsoil filter, I started my rig up and couldn’t believe how much quieter the engine sounded. That same day I ordered all of the Amsoil required to change every component on my truck. My transmission is running about 20 degrees cooler in a hard pull and the transfer case and the front and rear differentials noise level also dropped. I also gain about 2 miles per gallon in fuel consumption. This is going to be my last rig I buy as I will be retiring soon, I’m going to make sure it gets the best care to make sure.

I have used other diesel oil in my trucks, suvs, tractors, back holes and even some cars. I have found that amsoil performs better then almost all the other brands. I just know that out of all the oils I have used amsoil works better in all condition I have run into. The price of the oil cost as much as the rest of the diesel oils it just holes up better and amsoil oil filter cleans oil better. I have been using amsoil for over thirty years and still like it.