Customer Ratings & Reviews

I love AmsOil. It keeps my engine running clean and smooth. I’ve been using it for almost 5 years now and it doesn’t disappoint.

I have been using Signature Series 5W30 in my 2007 Toyota Prius for the last couple of years now and I have noticed a marked improvement in overall engine performance as a result. The engine used turn on and turn off rough when shifting in and out of electric drive mode. Not since using Signature Series have I noticed this issue. The engine runs and idles very smooth and have seen improvement in overall MPG. I would highly recommend this product for anyone looking for a high quality motor oil to help their vehicle run as smoothly and efficiently as possible!

I use this oil in the wifes Honda, they call for 0W20 as it is critical for oil pressure in tight places on start up. This oil does that and protects when Hot. Good stuff.

The oil really holds up, I never have to add at the end of 5000 mile oil change!

The best oil to run your engine, I’ve been using AMsoil for 4 years, and all my vehicles are running like new

I can only comment on the purchase experience which was flawless and prompt as far as shipment and transaction goes with AMSOIL. I purchased this for a brand new Tacoma and plan to only use this product for the life of the vehicle but have read nothing but great things ab them. Will continue to follow up as time goes by.

This is the only oil that my car doesn’t use a quart between oil changes

The best oil ever for long mile 25k i like and I recommend yes

Amsoil is a great American success story,they have great products that do what it says.. that’s called integrity and the people who are there are absolutely awesome with customer service!

I've been using 5w30 Signature Series of over a year and a half in my 98 Chevy K1500 with over 285,000 original miles on the motor. The motor sounds so smooth and slick. Next I put it in my wife's Subaru Outback with 104,000 miles and the motor is so quiet and purrs like a kitten. This oil has been the best I've ever used.

I have been using AMSOIL products since 1976 in all my equipment because I know I am giving my equipment the best protection money can buy. An added bonus is an increase in fuel efficiency as well.

Have used AMSOIL for a number of years. SVT Focus has 345,000 miles with no trouble.

My 04 GTO has always ran amsoil since it came into the family and years later it still runs great

I have a 2012 CTSv driveline in my 1971 Cutlass I have noticed that the supercharged LSA motor is showing 4lbs better oil pressure and less mechanical noise.