Customer Ratings & Reviews

Great product , does more than what it says. All fluids in trucks and dirt , street bike .

I use this product in my 2014 Silverado 2500 duramax diesel. The intervals between oil changes are phenomenal. All amsoil product lines are worth the money including this max duty diesel oil.

Great oil! All of my UTVs, farm equipment, and trucks are diesel. When in the northern sections of the country and extremely cold, there is a noticeable ease with startup vs conventional oils. I'll never go back.

Great product! Been using the diesel oil since my truck was new. Truck now has 155,000 miles and hasn't skipped a beat!

Covers my 6.7 in cold conditions

This is an outstanding product

I swear by amsoil for anything i own and always will

I use this product in a 2012 Ram with a 6.7 Cummins motor. The oil does get very dark between changes. Have not had any issues, and motor oils do get strained with diesels.

Truck really loves this oil, since I've made the switch!!

Never had a engine go down using Amsoil. Put a ton of miles on my diesel engines as well as hour's. All is good.

I have a 2007 GMC Diesel with the LMM engine and over 300,000km's. I did the first oil change and i was surprised that the particulate sensor said it was due for another change within 5000km's. I figured it was cleaning out the carbon and residue from the old oil change and changed it again. This time it went longer but still less than it should. The third change we went on a family vacation which involved towing our trailer over 6000km's. Came back and still had over 30% left. I suspect inwas right and this oil was cleaning out the deposits and gunk from my old oil. Moral of the story, if it seems to be getting dirty faster it probably is, but once it is cleans out the old seems to last longer and work better. I'll let you know in another 100,000km's or so.

I use this oil in my ecodiesel, I just recently did an oil analysis and it came back perfect. I will continue to use this great product

Truck runs quieter. Especially in cold weather.

I change my oil once a year his oil allows me up to 25,000 miles before I have to change.

I run Ams oil in my truck, SUV and motor cycle .It costs a little more but to me it's worth the extra cost.. I tend to push my oil changes a little longer so I just use what I think is the best.

I use this product in my pick up that has a Duramax and it with 187,000 miles

Amsoil is a very good oil for my echo diesel dodge truck. I have used Ams for years and I am sold on the product.

We have used amsoil on our farm and if it holds up there it can hold up to any thing! I won't use any thing but amsoil products in every thing I own!

I have nine diesels on the ranch and use Max-Duty in all of them including a few gasoline engines. Works like I expect it to work.

great product