Customer Ratings & Reviews

I like it and the convenience of ordering online. Fuel economy wise I can't tell any difference.

I have been using signature series for many years now and have always had outstanding performance with it. Best thing about it is its mileage interval for changing; this ultimately saves me time and money. I have a 23 year old vehicle with no oil leaks with little to no usage between oil changes.

I bought my 2010 Lancer Ralliart new and have used Amsoil signature series 5w-30 oil the entire time I have owned the car. I order it on the internet and bring it to the dealership with me when I do the regular service intervals. My car has never had any issues. I would recommend this product for any turbo car for sure.

Always does great.

The best fully synthetic oil money can buy. Second to none

Used this product for over 17 years and have found it to be all, if not more than, it claims to be, an excellent product. My vehicles run smoother and cooler using Amsoil Signature oil.

I have a built genV l86. And have been running Amsoil sense. This oil contain the products needed for long bearing and cam life life. So far 10,000 miles on my 540hp 6.2 and three oil changes it’s a real comfort to see the oil draining out about as clean as when it was put in. Sweet

Been using this in both our Chevys. So far so good. We use Amsoil in all our vehicles.

OW-40 is what factory recommends for my 2016 Power Wagon. Been using this since first oil change at 4000 miles. No engine issues yet.

I have used since new and it runs like new. Used these oils in all my cars and never had any engine issues including no leaks..

Love this oil. Have a 2014 Ram Hemi 5.7 and don't hear lifter noise now that Iam using AMSOIL. 5 thumbs up!!

No complaints. I use 5w/30 Sig series in my 2004 Mustang Cobra that sees mostly track day / HPDE sessions. I also use this in my 17 STI, and in my 99 Ford ranger. I have not done an oil analysis yet but as of now i have not see any excess metal in my oil once drained or in my PCV catch cans. Will keep using.

been useing amsoil for over two years in all my cars and trucks couldnt be more happier with product

Been using Mobil 1 for years, and changed to Ames oil due to the specs

My car runs smoother and doesn't use as much oil and uses less fuel too

Quick shipping and great customer service

I use this in my customers vehicles since it's been offered. Perfect !

I've used these oils since they came out so they work perfectly for my customers

SORRY DID NOT USE YET WAITING FOR WEATHER TO WARM UP SPRING

We've been using the product in my wife's Lexus and are very pleased. My 2019 Ram 2500 Cummins turbo has been switched over and on a trip to Arizona showed a 1+ mpg improvement. Our experience has been great.