Customer Ratings & Reviews

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.

I have been using amsoil for 2yrs now and I can tell a difference between amsoil and mobile 1 which is what I was using. Don't get me wrong mobile 1 is great oil, but my Toyota Camry sounds quieter and smoother with amsoil signature series 0w 20.

It’s the best plain and simple

Good

I've been using Amsoil Signature series for over a year now. Won't use anything else in my vehicles!

Great product, worth the cost.

Very pleased

Just what my Shelby GT350 needed.??

Great product! I use and highly recommend the signature series in my daily and my fun car! Noticeable improvement on acceleration and much cleaner and quieter engine operation!

I use this oil in a turbo BMW as it is called for this weight. Since I like other weight oils from Amzoil, I use this in the BMW.

Used in my 2007 Ford F-150 with 220,000 miles.