Customer Ratings & Reviews

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.

I have a boosted 800 hp corvette. I need the best wear protection, and trust amsoil to perform. I have had my car for over 5 years and no major problems related to the engine mechanical parts. I contribute that to amsoil full synthetic oil. I am a spirited driver and always like to go fast. I need the best oil money can buy. And I trust amsoil.

Amsoil Signature Series Motor Oil is the only motor oil that I trust to protect our gas engines to provide superior protection and longer drain intervals over any other “synthetic” on the market. Been using it in all of our vehicles for years.

Great oil only complaint is a week after I purchased they offered the free rag offer kind of disappointing

Amsoil signature is the absolute best for HOT environment. 110 degrees I have no worries with in my Lexus during super hot Arizona summers... And I only change it 1 a year, Thank you Amsoil

Superior synthetic oil for performance cars. Infiniti G37 Best engine protection you can by, excellent in hot environment...

I'll keep it simple. 1st Titan 247k 2nd Titan 344k 3rd and current Titan 127k and going strong! All have been on Amsoil since day one and I've yet to be disappointed!

Best oil

Amsoil is the first in lubricant!! Hands down the goat. Love this product and shipping was crazy fast

Switching from Mobil 1 to AMSOIL Signature Series 0w20 gave me oil pressure faster on cold starts in the -20 and colder temps. Amazing products.

I have used Amsoil products for quite some time now and have always been surprised and how good they work I will always continue to use them and I recommend others to do so!

Whipple recommended 5w50 and Amsoil is the best!