Customer Ratings & Reviews

Since back in 80s amsoil rep sold me on this oil. This is the best motor oil .

I use signature series 5W-30 to change my truck's oil

It is a great product, can do 15,000 oil changes (turbo) with 15,000 filter with superior protection at a cost less than a regular oil change. Can't beat that!!

I will be using this in my 2017 Chevy Silverado 4x4 for as long as I own it! Great product!

Great pill always looks good after extended drain intervals!!

I have used Amsoil previously on other vehicles and I currently use this oil on two different Jeeps I own.

This is used in a 2012 STi. Engine seems to like it.

Only oil I use for any engine I own. An investment worth the payout.

I've used Amsoil for over 20 years! This is by far the best oil you can buy! The warranty speaks for itself!!!!

I use this oil in my pickup

I simply use AMS OIL in all my cars and don't look elsewhere. Never had a problem, all engines work like new, no worries. You want the best, look no further.

This my first time using the oils, and I like it...I would go back to conventional oil.. Thanks AMSOL...

I use ss 5w-20 in my pickup, good startup when cold.

I run Amsoil in all our company fleet vehicles, my personal vehicles and all my race bikes. Our one panel van hit 600,000 km and still runs awesome doesn't burn oil and still shifts perfectly, I trust Amsoil for everything.

I've used AMSOIL for decades. It has saved me lots of $$$ in repairs.

I run a lot of highway miles. The truck has run smoother and is very quiet. I also notice that dry startup is much quieter. My mileage has stayed nearly the same.

Have been using Amsoil in our cars and motorcycles now for over 20 years. Top notch product at a reasonable price.

I have used AMS oil since the first oil change on my 2011 Kia Rio5 and now at 78,000 miles I believe I made the right choice. Car has never used oil even at 9000 mile oil changes. I highly recommend this product.

I've been using Amsoil for over 30 years. Love it !! I get improved MPG in all the vehicles I use it in . Great stuff , I do six thousand miles between changing. Off sets the price difference.

There is really one side effect to using the signature series oil and that is everytime I get into my car now I can't tell if it is running or not now that I changed the oil. Sometimes I get into the car while it is running and push my push button to start it and inadvertently shut it off.