Customer Ratings & Reviews

This is the only oil I would use.

This oil has proven to be the best. It lasts longer and my engine sounds and runs amazing when I use it.

Fast and on time. Love to get oil and filters at one place.

Why not use the best oil in your tractor. If you want it to last use the best. Bought my tractor used with only 125 hours on it and I would like it to last the rest of my life. A soil is cheap insurance for your engine. When it comes time to change my hydraulic fluid I know where I will shop.

I have been using Amsoil oil products on and off for over two decades. No matter what I have tried I always end up coming back to Amsoil. Probably the best diesel engine oil on the market. If you can afford a new diesel, you can afford quality diesel engine oil. Don't be dumb and go cheap on oil changes.

So I ordered my oil and it was delivered elsewhere. I emailed amsoil and without hesitation they sent me a replacement box! They are the best and their customer service is phenomenal. I am a lifetime customer from now on!

Oil seems to be working great. Oil pressures are good and temps are great as well. Truck seems to like it and is running well with it.

Absolutely love this product. It is all I run in my 2015 f-250 6.7 power stroke.

this is the best oil on the market

I have used Amsoil 5w/40 in my diesel F250 since 2008 I would not use anything else!

great product

Best quality oil on the market!

Great product, price is worth the extended life and frequent changes.

I run this oil in my 2022 Duramax. This oil does not feel like it broke down at all after the 1 year change interval. I rubbed a little of the old oil between my fingers after the change, and it still felt new. I’ll keeping running it in my truck for years to come.

Just changed oil in my 2017 Dodge Ram 2500 to Amsoil 15W-40 100% Synthetic and what a difference in performance. Definitely my truck is a lot quieter and seems to have more torque. Getting ready to change my 2015 Lexus RX 350 to Amsoil 100% synthetic, these Amsoil products have really made a difference in the performance of my vehicles. A+

I have only used Amsoil Signature 5-40 Diesel oil in my 2016 Ram since I purchased it with 722 miles. I do routine oil analysis at Blackstone Labs. I follow manufacturers recommended oil change interval of 10k. I just completed the 170k change and await the lab's analysis. I usually add 1/2 qt. between changes. Amsoil makes quality lubricants that can be surpassed!

Shipped promptly, and is a great product. Unpaid spokes person.

This is the best diesel oil to use in your diesel engine....my cummins works & sounds smoother

Great product!

Works great