Customer Ratings & Reviews

I have always used high quality synthetic oils in all of my cars (daily drivers) because I believe it pays off in reduced engine wear. The Amsoil Signature Series is on par, if not a notch above the other oils I have used in terms of performance. What sets this apart from the competitors is the extended drain interval. Since my car is turbocharged, I follow the heavy duty recommendations (15k) with a filter change per Chevy's instructions (7.5k). This saves me time (cartridge filter takes 2 minutes) and money versus an oil with a standard drain interval. It would save even more in a vehicle that can follow the 25k drain. Even at the end of the 15k, I don't notice any decrease in performance, but I change it anyway.

My latest use of Synthetic Series OW-20,in a 2016 Hybrid Ford Fusion. Smooth performance, and adding more miles per gallon. WONDERFUL!

So far I have good results and I am extending drain intervals top 10k miles even after towing 7500 pounds most of the engines life.

I did not really believe all the claims about AMSOIL until I checked for myself. I used it, had oil analysis done and was amazed at the results. I have been a user for 12 years in 4 vehicles and have no worries when it comes to lubrication of the engines internal parts.

I actually recommended to my friend so its for him and he's been using it for years. I have been using AMSOIL products for over 38 years. I have used almost every product AMSOIL makes.

I use Amsoil in the car, my motorcycle, and in any other engine I may possess. I am not brand loyal except when I find a product that is so superior that no comparison exists.

I have used Amsoil for years in several different vehicles and have found the product to be superior to the other products that are found in stores. I have had comments about how well my vehicles have run while using your product.

Not much to say, really. I'm pretty sure the main ingredient is awesome sauce, though. I won't put anything else in any of my ICE-powered vehicles. If Amsoil could make electrons, you know e-cars would go faster.

Best oil ever.

I've tried them all, and I was never happy entirely with the other oils. Some burned, some lost viscosity way too fast and some looked straight black just after a few thousand miles. That being said so far I'm loving Amsoil, doesn't burn, always looks clean at changes and holds viscosity. So far, signature series has been my favorite oil for my 2004 Evo 8. +1 to Amsoil I feel like I can trust it when I tracking the car or driving it around the streets.

I have used Amsoi in all my vehicles sense it first came out, I notices a increase in fuel economy and performance. I put it in the motor, Transmission and rear end of my race car and increased my ET by .5 seconds which is amazing I also use it in my semi truck with the same results in mileage and performance

Awesome oil. I have a 04 Dakota 4.7 with the dreaded lifter knock and after trying a few different things. I was recommended to try some amsoil products and I will never go back to anything else. Gave my motor a good feel and the tapping is very minimal, you can barely hear it in and it goes away after a second or two. Will always use amsoil products.

My boss turned me on to this product and he's been using it for years in end. I always used synthetic oils in my trucks and cars but never used amsoil, I can already tell a difference in gas mileage and performance in my car since I converted to this product. Very satisfied !

Use this in my Prius Hybrid and gained 1.3 miles per gallon. The added protection of Amsoil in my engine gives me a great peace of mind.

I have used this product for about eight years now and my car is 13 years old and still going strong/

I use this in my cars from brand new!!

My truck uses 8 qtrs and I was not wanting to change the oil every 3 to 4 thousand miles so I used Amsoil for the best protection and duration. I use Amsoil in all of my transportation. Never had a mechanical problem. Start out with the best and don't worry.

I have ran Amsoil in my diesel truck since 2008 and converted my girlfriends gas truck over about two years ago. I like reading about the testing done comparing Amsoil products to other companies products. I feel like Im using the best oil out there. Soon my 70 Chevelle will run Amsoil too.

I replaced a leading brand with Amsoil because genuine lab tests demonstrated superior performance in our hot climate. It ,as a bonus stay's cleaner longer in my motorcycle and high performance boat and car engines than other synthetics and petroleum based oils, which makes for far less combustion made carbon and fuel contamination, the two main engine damaging agents that accumulate in the crankcase..

I works well in my dakota and have used only amsoil in my ruck for the last 100k I have @190k on it now