I like this synthetic diesel oil because it gives me piece of mind.

I've been using this oil about 4 years now 77k total mileage. No problems thus far I change every 7000 miles.

Through oil analysis with Blackstone Labs I learned that the Rotella product I was using was showing premature viscosity thinning in my 2022 RAM Cummins. I was swayed by a gentleman in a diesel truck forum to check out Amsoil. Well let’s just say after much reading and video watching and switching to Amsoil in my Diesels (Cummins and Duramax both different weights) I’m highly impressed with the company, engineering, and testing they put into their products. I would highly recommend researching YouTube, Google, and the forms and learn as much as you can about the AMSOIL company. You’ll be impressed, I know I am!

Using since I bought my truck new in 2020. Hasn't failed me yet.

This oil surpass any other oil.

Best oil ever

Great product and great price when you are a preferred customer. I have a 95 F-350 and a 15 F-250 so I spend a lot of money doing oil changes. Very speedy delivery!!!!

I have been a loyal Amsoil user since 2008 and this has been the oil of choice since I purchased my 1999 Ford F250 SD in 2010 with 91K on the odometer. The truck runs just as well today and when you look in the valve cover it is clean inside. Great oil!

Oe products are excellent. Been using amsoil for years.

The amsoil products i ordered arrived on time (actually earlier than estimated) and came well packaged. Everything worked great and as usual my engine runs quieter and cooler. My only problem is twice now i have made orders and not recieved the free gift advertised on the website.

Truck runs better. Starts smooth.

Best oil I have ever used. Life long customer for sure. Getting the family truck one by one!

I recently changed my oil to the amsoil heavy duty 10-30 for the newer Cummins engines and surprisingly I noticed the engine is quieter and my mpg went up a little bit .

Exactly what I needed at a reasonable price and arrived at my front door the next day!

Works great, only issue is i bought quarts last time and everyone of them where less a little bit of a quart,i had to add 1 2/3 quarts on a 13 quart oil change on my truck

Excellent oil for my ram 3500. My father has a ford truck with over a million miles on it and always ran AMSOIL. Bottles are easy to handle and don’t leak.

great oil works for my application

Its very good oil.

I switched to Amsoil 10w30 about a year ago. My 6.0 psd starts quicker and is way quieter than it was before. I would not have believed it if I hadn’t done it. When I order it’s on my porch in 2 days. Very happy customer

Very quick delivery I’m very comfortable with the best oil