Customer Ratings & Reviews

Always of the highest quality. I highly recommend this oil.

The only oil I've run in my last two cars. Both of them performed great with this oil.

Get oil engine runs great and valves are quiet after 130000 miles

I am not a chemist or a scientist but in my short experience using the product, I believe that this product is the best I am going to get! I have 2 more vehicles to switch over to Amsoil products.

Great product! 100k miles on a 3.5L Ford. My TBN number is 2.5 with 15k miles between oil changes and no oil added.

My oil consuming car went from burning a quart of synthetic blend at 274 miles to 880 miles with Signature.

A couple of years ago Porsche updated their oil recommendations due to changes in oil manufacturing and environmental requirements. I had been using the recommended 0W40 viscosity oil but when I learned of the change I researched the additive packages and blend. Amsoil Signature 5W50 surpasses all of the criteria for the Porsche recommended oil. Since I began using the 5W50 15,000 miles ago I have seen better fuel economy, lower engine temps and easier starting. I did a bore scope of my pistons and they cleaner now than with the OEM oil. Considering the age of my engine (20 years and 118,000 miles) I need a reliable oil that has the properties of Amsoil Signature series.

I have used this oil for several decades now. Still great.

Great recommendation and I love the way y truck runs. Exceptional customer service!

ONLY THE GREATEST OIL ON THE MARKET TODAY!

Every vehicle that I have ever owned with Amsoil had only yearly oil changes. They ran and run perfectly. The engines were perfect clean.

I order this for a good friend to use in his 2013 Shelby Mustang. He has been running it and the respective oil filters from Amsoil, and is very satisfied with its performance. I also run Amsoil products in all of my vehicles, including my Harley

I run my cars over 300,000 and this seems to keep them clean and properly lubricated. Have 04 3400cc Chev and 09 3500cc Chev. I change at 10,000 miles. Have sent in samples and tested out ok. The 3500 engine has variable valve timing so don't want that gummed up. Both cars look clean down in the valve covers. No engine repairs.

Excellent product. Auto dealer mechanics smile and agree, Amsoil is the best oil for high efficiency and long term protection.

Great oil and injector cleaner.Sample oil at 20000 Kim’s and consistently comes back as no change needed.I change anyways but it speaks for the quality of the product.