Customer Ratings & Reviews

I love Amsoil products. It gives me great comfort and piece of mind knowing all of my engines from my Can Am side by side, my lawn mowers, motorcycle and all my trucks are protected with the best oils on the market today.

Great oil for any truck

Amsoil's excellent SS oils are the only CK4 lubes I'll use on a CI4+ application, especially if I don't have immediate access to AME/HDD.

I have been using 15w40 marine/heavy duty for 25 years. Will be using this new signature series in my 2015 Duramax next oil change (waited 25000miles).

This oil has allowed me to go twice as long between oil changes.(from 7500) to 12-14K. Not having to add any along the way.

Excellent product highly recommended

Excellent resilience to heat and cold with the quality to go way past any other oils life

I like this product so much that I have the next to oil changes ready and waiting. My truck will only be using amsoil

I have had no problems with this oil works well in my truck

I've used Amsoil oil in my diesel engines for years, and their latest oil is the best. Great performance whether it is cold winters or hot summers. I've gone to the same oil for my diesel tractors - and Amsoil keeps them humming. While different viscosities and grades, I have found the extended Euro oils perfect for my diesel turbocharged cars too!

My Cummins engine has runs smoother and better with Amsoil. I switched from Rotella which is a great oil but, hands down Amsoil is the best !

I started using Amsoil signature-series-max-duty-synthetic-diesel-oil-15w-40 in my 2009 gmc duramax diesel when I bought it new on the first oil change and every oil change since. My truck has almost 200,000 miles on it. Still runs strong and uses no oil between oil changes. Won’t use any oil but this Amsoil oil.

I would highly recommend this product

The only oil products I use!

I use my 2004 GMC 2500HD with the 6.6 Duramax to tow a 32' living quarters horse trailer. The truck is also my daily driver so I need dependability whether running errands or pulling the trailer. I have been using Amsoil since I bought the truck used with 88,000 miles on it. I now have 242,000 on the odometer. All of my fluid are also Amsoil and I have the dual remote oil filtration system. The Duramax purrs and never runs hot, even pulling up long grades.

I have been using synthetic oils from Amsoil for years with great success and when I purchased a Dodge diesel pick-up I immediately put the Amsoil synthetic oil in it also. I trust Amsoil products completely and recommend them all the time.

Great quality oil

Actually added a couple of mpg on my 2003 Duramax. Like the product.

Trucks are expensive buy the best oil and save money

Even the local Ford place recommends and will service my F250 with Amsoil