Customer Ratings & Reviews

This is all I will ever run it’s worth the money I’m a preferred customer and everyone that I have turned onto Amsoil after an engine flesh has said their vehicle has never ran better smoother and they could feel the power increase. I would love to become a dealer one day and convert every oil in my truck to amsoil best product I have ever used

I love this oil. When it's cold out the engine spins over just like it does it the summer.

I highly recommend AMSOIL for our vehicles. it’s a premium quality oil.and I can be confident on road trips that my engine will be well lubricated.

Dumped the factory oil from my 2024 John Deere 1025r. Maintenance schedule says 200 hours for the first change. No way. I pulled it at 50 hours. It was dark. Some wear metals as expected. I swapped it over to Amsoil 15w-40 Signature Series. First thing I noticed was how easy it was to start and the noise level even dropped. The engine actually seemed to run smoother. I’m a maintenance fanatic. I believe frequent oil changes at the beginning. I will probably pull this out at the 100 hours and then just change it once a year afterwards.

I have always used amsoil products and will continue to use them, this diesel oil was exactly what my high horsepower heavy hauling Duramax needed

the Best oil around. Engine seems to run quieter. Also improved gas millage

Have nothing but good luck with this oil and my Amsoil dealer it’s the best to deal with!! There to help anytime I need it or just to place my order.

I run this in all my diesel’s trucks and Volkswagen diesel car work very well for me

Exactly what I ordered and came before delivery date which is very good

Good product and service

No oil is better—none! I have used this product since May 2020. My diesel engine purrs like a content kitten, and I have gone 15K miles between oil changes.

I have been using this oil in my 2015 3500 Silverado with a Duramax diesel. I started using the oil at 10,000 miles. I now currently have 198,000. It doesn’t use oil and it does not leak oil. I change the oil every 7500 miles. Absolutely love this product.

Great oil to use on all your toys !

This is seriously the best oil on the market for gas and diesel trucks. Comes in just a few days. I will always use Amsoil

Amsoil is an incredible product that really delivers both in performance and customer service. I highly recommend all of their products.

Best oil to use.

We use it because it's the best stuff on the market.

I use this oil in my truck and there is a noticeable difference in hot oil pressure. With other oils the hot oil pressure is about 38 PSI and with AMSOIL 15W-40 the hot oil pressure is about 42 PSI. The cold start valve noise is noticeable quieter with the AMSOIL than with other oils.

Been using these products for over 20 years highly recommend best in the business AMSOIL. We got out of a 89 Ford straight, six 450,000 miles. it actually still started, but motor had no more power

Great oil! I’ve been running in my 2017 duramax since it was new! 200k and going strong!