The only oils I use. Always the best.

I have been using 5w-30 Signature Series in my 2013 F150 Ecoboost with 105,000 miles. I bought it with 51,000 miles and have been using this oil since. I can definitely notice the difference in how it feels and how quiet the motor is. I used to be a Mobil 1 guy but Amsoil is my choice now.

Awesome product, I’ve been using it for years….. Highly recommend!

I have been using AMSOIL in my 2022 Bronco since the 1st oil change at 5,000 miles. I wanted to use true synthetic especially since the 2.7 uses turbos. Not a hiccup to date. I am certainly a customer for life. This oil is amazing.

Do the math. Works great for me. Thanjs

Longest lasting & full synthetic! If you're living in cold climates… this is the go to

Excellent oil

Have a 21 ss camaro oil options were thin so decided to try this product. Only have a couple miles on oil change but so far so good

This is hands down the best oil I have gotten for my Supra. Oil flow is great and pressure is exactly what you would want. 10/10

I was recommended do use this oil in my truck by my mechanic I was kind of hesitant because of the cost of the oil. But once I started using this all in my truck, it is amazing. The difference in the performance is night and day.

Been using ams oil for a few years now would highly recommend all their products

I wouldn’t trust any other brand. I k ow my engine is performing and happy on the track with this product in there

This is some good stuff! They stand behind their word and testing

Been using Amsoil on my 2007 Chrysler Town and country for quite a few years now and I am very pleased with my car's performance.

My truck runs smoother now since I’ve started using Amsoil

This oil is just as good as all their signature series oils.

I own two Hyundai Elantra N’s and changed oil on both at the same time. One had factory oil the other Amsoil. Sent samples of oil from both to Speediagostix for analysis. Reports came back showing superior protection from Amsoil and I am getting 1 mpg better with Amsoil. The oil stands up to its claims.

I’ve been using Signature Series engine oil in various viscosities for about twenty years. I change my oil at 15,000 mile intervals and have zero engine problems and at 100,000 miles on most of the previous cars and trucks I have never had to add any oil between changes. The inside of my engines are as clean as new, and there is no evidence of the brown varnish that coats the internals of the engine that is evident with most engine oils these days.

Really like this in my older Chevy truck to extend the life of my engine. Highly recommend.

I have been using the signature series almost 4 years on everything I own. Small engine, big engine, and the fuel storage. And it's never let me down in any way. Way past my expectations and more. I will continue to use these products forever