Customer Ratings & Reviews

I've been using Amsoil since the early ' 80s. Always inpressed with its anti- wear performance and long drain capabilities. Outstanding!!

AMSOIL Signature Series 5W-30 100% Synthetic Motor Oil,,,great product and great price

I've been using Amsoil on my 6th Gen ZL1 since I got it and have never had any issues. Oil pressure is higher than oem oil. Would recommend.

this oil has kept my 02 yukon in perfect mechanical shape! she always starts on the second bump (the fuel rail has to charge) 180K miles and it still passes emissions! i use AMSOIL in everything i can! Guaranteed to be the best!

I own a 2003 Ford Explorer Sport (297K miles) & a 1999 Lexus ES300 (188K miles) and have been using the Signature Series motor oil for about three years. I know this oil is supposed to be good for 25K miles, but I change my oil every 7K. While I don't pretend to know what's going on inside these engines, I have experienced zero oil related issues, and I trust this product. Good marketing strikes again!!!

Been using the supreme protection for years and no problems at all

There is no better oil than AMSOIL Signature Series oil. I've been using AMSOIL for 30 years and it has always been exceptional. I will never use any other oil but AMSOIL - period !!!

My engine never run so smooth!

Been using their oil in all my diesels.

This engine in it's beginning back in the 90's was spec'd for 10w-30. In my opinion, the debatably worst decision Chrysler ever made will quiet down and run buttery smooth. It's not going to turn the torque-less wonder into a powerhouse, and your mpg might drop a fraction of a percent but come on, you're driving a vehicle with the aerodynamics of a refrigerator box. At the very least, give your mini-van engine the oil it needs.

Love this oil and my car loves it

I only changed my oil every six months. I never put more than 8000 miles engine is absolutely clean not a problem all good.

Just cheap insurance policy, knowing that you have the best oil out there in your car especially new cars with turbo i’ll spend the extra couple of bucks to fill my car oil reservoir with Amsoil signature series

Amsoil makes the best oil for your vehicle hands down. My 4runners love this oil!

Awesome oil for all the vehicles. Runs like new.

I use it because it never let me down yet ! simply saying I use it because it works

Would be nice if it came in gallons

Ever since switching all my vehicles to AMSOIL I have noticed a difference in performance. Great product definitely recommend if you want your vehicles to last.

I've run Signature Series specifically in my turbo DI daily driver because of the protection it offers against LSPI that plagues these engines. It's worth every penny knowing I'm running an oil I can count on.

I love and trust the quality of the product for all of my engines. If Amsoil sells it for my vehicle, I'm using it, and i know it is protected. I just wish it wasn't as expensive, but it is what it is. Great stuff. I love it overall