Just changed oil in our new Chevy Duramax 3500HD 3000 miles on truck. pulled 33 ft toy hauler to Colorado 1800 miles round trip an used 1/4 quart of oil. Will continue using Amsoil in all my engines.

i have used amsoil back from the 70's, i use all of these in all my stuff

Awesome oil been running this oil in my 2018 Ram 2500 since second oil change and currently at 97,000 miles.

I`m 70 years old was in the auto repair business for 49 years. involved in racing my whole life an currently drag race a challenger hellcat. I decided to forge the bottom end of the motor an could not believe how good everything looked inside the motor. connecting rod bearings look like they just came out of the box. pistons an cylinder walls are perfect. but at the same time not all that surprised . always used amsoil an will continue to do so.

The engine runs cooler and smoother with this oil. Plus I get 7500 to 9000 miles between changes.

Best on the market.

I run this in all of my diesel equipment (tractor, excavator, ram 5500, generator) and only change once a year regardless of miles/hours. This saves me time and money from having to do multiple changes if running conventional oil. It also seems to have a much higher retention/suspension capacity for contaminants than other oils.

Been using for 40 yrs. Best of the Best.

I am so impressed with the results of the laboratory oil analysis since switching to AMSOIL Signature Synthetic motor oils. AMSOIL is a company with a spine of integrity.

I will always use products I can trust in. Amsoil is at the head of my list! I have created quite a few converts. Autos and trucks are usually the second biggest investment in a person's life so DO NOT trust any old oil. I'll stick to this brand so I won't have something else to worry about.

Excellent synthetic oil. Provides excellent wear prodection. Use it in all my vehicles

This is by far the best oil out there!! And… don’t have to change it all the time

My order always arrive quickly and accurate. However, my last order the warehouse forgot to include my WIX oil filter. I called Amsoil and they sent me one the next day. Great customer service. Mike

I believe Max duty 6 has kept my 6.6 duramax running at it best, been using its whole life.

My 2002 Dodge 2500 Has been lubricated with AMSOIL products for about 16 years and over 200,000 miles. I would not use any other product. The 5.9BT has all the power and the running gear is smooth and noise free.

Best engine oil I’ve ever used , great for the eco Diesel engine !

Run this on all of our diesel trucks great for cold weather starts Trucks run smoother and deliver better power than conventional oils

since switching over to Amsoil Synthetic 15/40 0il ,oil press is better ,engine runs quieter

Your products are great .I now have my son using them & he does more research than anybody I know

When I found out this was available, I started using it. I need to get the other fluids switched over.