Customer Ratings & Reviews

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

if you want the best protection for your engine buy amsoil. I use it in everything so my equipment will last.

Use this in my 12v Cummins was adding about a half a quart of oil every 1000 miles before switching to to this oil now it's about a half a quart every 4000 miles and I change it every 5k.

Hands down the best oil out there i have tested my oil after it comes out and still have amazing tbn numbers in ty he 5 range with 7000 miles on that oil

When I ordered my duramax in 08 I wanted to run the best oil and fluids because I don't plan on buying another 65,000 truck. I researched extensively and found the decision easy. Everything but the radiator has amsol. I'm at 320,000 problem free miles. With the exception of the headlights that regularly burn out, I haven't had one single issue with my truck. I bought a 24' triton boat with a 300 yamaha and the day my warranty ran out it also got refilled with amsol marine oil. .

Was introduced to this oil and it really works. Protecting my 6.0 Diesel Engine under any load, especially with the Bypass oil system!