Customer Ratings & Reviews

I won't use anything else in my vehicles. Signature series is by Far the best Motor oil I have used.

Very good product,will purchase again along with radiator coolant...thanks

Have used Amsoil Signature oil and Amsoil products in all my vehicles for 14 years, nothing better!

Have been using this oil in my wife's Ford escape Ecoboost engine since new and are now at over a hundred thousand miles with zero issues! No junkie build up and I change between 12 and 15 thousand miles.

I swear by amsoil products..i use them in everything i own..even when due for oil change it still looks clean..the extra money now saves big time later

started using Amsoil on my last oil changes and have had no problems at all!!

I've never had any issues with AMSOIL products. I love their oils and purchase them regularly.

My top off when low . Since these Hemi ‘s run hot. But with ‘‘this oil cooler temps.

I wanted to try something new other than the other engine oil company’s . I am very happy with the results I have been seeing and will definitely recommend to anyone that’s wants a change

Experimenting with Amsoil motor oil, we'll see if it's worth all the hype

I use it to ease my 5-50 sig.tuned 2.0t Audi into cold weather.love the gallon jugs.

I use it on a 19 ram 24 caddy and 08 corvette altogether about 23 qts so the gallons are more economical and less confusing.I also cut my oil filters for inspecting.

2012 Ram 1500 Crew Cab that developed the infamous tick. I started using Amsoil in early 2024 and within two oil changes the tick was greatly reduced. It is not a fix by any means, but goes to show what a high quality oil can do for the engine in protecting it.

It is the best oil I have used. I feel more than confident my twin turbos on my 3.5 eco-boost are well protected. The proof of this occurred when my engine went in for warranty work for leaks and timing chain issues. The manufacturer was suggesting I was not taking care of the engine, but during teardown, the engine was perfectly clean with no trace of varnish. When asked what I use, there were no more questions and the warranty went through! I also find the engine starts and runs quite smoothly during the cold weather months with no loss of oil pressure. Combine this with the Amsoil oil filter, you habve a winning combination to protect your motor!

Best oil ever run like a new

My 6.4 hemi runs smooth and quiet with it. Hoping for many miles out of it using amsoil

Been using Amsoil for 20 years+ exceptionally satisfied

Thought I was to get a free headlamp which I did not receive. Other than that everything was good

Best oil to put in my car! 10/10

No issues so far. Been using this oil for 50000 miles. I do change the oil when the car says 25%. Filter fits perfectly.