Customer Ratings & Reviews

I have used amsoil for years . It's the best & has always improved on its products.

Lasts a full year before the next oil change. I like the 2.5 Gallon jugs the best. Great product!

After 500 miles, the oil is still honey colored, not black like the other oils I have used. This oil is great.

Been using this for 10 years now and never had any trouble. Great protection and better in cold winter starts

Love Amsoil and it's reliability

I use this product in my 28 carolina classic with 2 4bcummins diesel engines. the oil has kept the engines clean and running smooth, with no smoke. the engines have 1300 hours on them.

Exceeds expectations. Ordinarily, when I used other motor oils discoloration takes place within 1 to 2000 miles. Thus far since I switched to Amsoil, 3000 miles, no discoloration and no oil consumption.

I wouldn't crank up my 2001 Powerstroke 7.3 diesel without Series 3000 in the crankcase !! It's amazing protection, and allows me to only change oil when needed. The auxillary remote filtration system I purchased from Amsoil allows me years of worry-free protection !!!! NOTHING better !!!!

I've been using using this product in my 2001 Ford Excursion 7.3L Diesel. Change every 15,000 miles . 288,000 miles so far ! High pressure oil actuates the fuel injectors on this engine. Still on original injectors. I believe the full synthetic oil has helped extend the life of the injectors. Several of my friends have had to replace their injectors on similar Ford diesels. Looking to put 500k miles on my Excursion. Amsoil products in transmission and rear end as well.

A great heavy duty diesel oil with high 12 total base number. Works great , quiet's engine noise, keeps good oil pressure and engine clean.

555

Performs as expected but on the pricey side.

Use it in my Duremax 350,000 on it does not use a drop of oil between changes.

I have used this oil in my 2006 Duramax since it's had 10,000 miles on it. I currently have 123,000 miles on it and no problems..

Love this oil for my '05 Duramax.

Best oil for my Dodge Ram 2500 5.9 Diesel.

I used this oil in my Sea Ray Sundancer whit 350 Mercruiser for 4 years and the Gear lube swell

I have used this oil since the very first oil change on my 04 Chevy Duramax. At 205K they pulled the valve covers to change out the injectors and it still looked factory new. No discoloration of the rocker arms or any build up. Just like new. Best thing I've ever done for my vehicles.

first time user for older cummins 5.9 hope it holds up to claims only thing i would ask for when purchasing amzoil is giving a sticker for window to right next oil change on

Great oil.