Great product fast shipping

Run 35k changes on the cummins running this a amsoil ea080 and the amsoil large bypass system. Last truck got 1.3 million miles on all original cummins 6.7 engine .

I am so pleased with this oil for my truck.

I have used this oil for the last 10 years in a 2015 duramax. I work the truck every day and have 209k miles on the truck. The truck doesn’t use any oil between its 7500 mile oil changes and still runs like new. I recommend giving it a try.

I used Amsoil in the 1980’s back then you had to know someone that sold it. Now we can order it online, it’s costly but I use it until I reach 12000-15000 miles which is usually about a year and a half. I trust the brand. I keep a spare case on hand.

Good clean product.

Great oil , no complaints , it even got rid of the classic duramax type writer tick ! I'll never use another oil in it now that I've used this

Always a pleasure Pays to be a member for discounts My goto products

My 3500 Ram HO definitely prefers the 5W-40 over the 10W-30. It runs noticeably smoother and quieter with 5W-40.

My 7.3 diesel loves this stuff!

Been a long time Preferred Member. This is my first diesel vehicle. I have trusted this oil in my gas engines for 25K change intervals. I will trust this oil in my diesel.

Only the best for my G3 RAM. Original turbo, no oil issues. 125k miles. What is not to like?

Ive been using amsoil almost 30 years and has certainly proven to me that it is everything they say it is..I certainly recomend it. Ive just started ordering directly through amsoil for the 25% discounted price and one of my orders had 2 quarts damaged, took a pic and emailed it and within hours they responded and sent new ones immediately. Couldnt be happier with service! ⭐️⭐️⭐️⭐️⭐️💯

The best

I have continually used the signature series 15w-40 from the first oil change when the truck was new. My 2014 Ram 3500 still runs strong. I always have my oil analyzed at every change. After 229k miles that analysis is still in the green. Had a couple minor oil leaks and a bad turbo actuator and that is all I have had to repair. Thanks Amsoil for your superior products.

Been using this oil for a few years now and I really like it. It has long life and works well with the Amsoil filter.

I use Amsoil 5W 40 Signature Series in my 2016 F350 with the 6.7 Powerstroke. I have reviewed several different brands and Amsoil is always in the top. It is also very competitively priced compared to Motorcraft Full Synthetic 5W-40. I appreciate the fact I can have it delivered right to my door and not have to go to the dealership and hope they have Synthetic in stock.

Great product I wouldn’t use any other motor oil in my vehicles

Awesome stuff. Changed the feel and sound of my 6.0. Extremely happy with this oil.

I love their product that's highly recommended by Ram trucks but it costs ! Wish it was competitive with Rotella, Valvoline, and others.