Customer Ratings & Reviews

First oil change at 1,000 miles. Only oil I trust to protect my new engine

I love Amsoil and will never go back to anything else. I've tried them all and the Signature Series is absolutely amazing and also does exactly what Valvoline r&d does and then some. I also use the High Mileage which is another fantastic oil. I have been running the Amsoil filter as well but I hate that it's made in Mexico now. Also I use the ATF and gear oil. Going to order the gun cleaner and oil next!

Man I really love this stuff. And with modern engine tolerances, I don't worry about running this stuff in my car.

I have used Amsoil for over a decade for my corvette and never I have been so impressed with a product, quality and service and Price with order direct from Amsoil!!

I’ve been using AMSOIL signature series products for 3 years now and have ZERO complaints I’ve never had an issue with my order and the AMSOIL products are the only lubricants on earth that actually live up to the hype. Amsoil is the only oil you can safely run extended drains with. I’ve had nothing but good results with every product I’ve bought from AMSOIL. The gear oil and engine oil are by far some of the best lubricants ever made

I run this oil all winter in both our vehicles and it is just great. Both cars run like new. The detergents and quality, are just second to none. It also ships so fast. Love ams oil.

Have been very pleased with all amsoil products. Use it in my vehicles and boat. Wish they would expand the oil filters to include the 2025 Chevrolet Colorado 2.7 l turbo and the 2026 Mazda cx50 non turbo

The best oil to use on anything!

Great oil that has been proven and protecting my engine over 200k miles!

Been using for 14 years and always delivered on time .

When I bought my new to me 2008 Honda Element EX, it had 165,000 miles. The owner described vtec problems and 'the code'. I changed the screen behind the solenoid valve and at the same time switched to Amsoil Signature Series 5w-20 and filter. Since then the vtec issues haven't come back even though the oil change intervals have been 15k yearly. Now at 256,000 miles it still runs great!

Been Running 5w50 Signature since my second oil change. Previously ran Motorcraft 5w50 synthetic but it dropped out of grade between changes. Both Whipple and Ford require 5w50 in supercharged 5.0 platforms. This is a daily driver with short trips on weekdays. Oil analyzed at every change with very low wear metals. Change oil and filter @ 5K, this oil stays in grade.

Seems like very good oil. I have read several engineer evaluations of this oil, and all show very good results. I will be using this oil for the duration of my ownership of the vehicle.

Oil was fine, but the multiple containers seems a bit redundant.

I've been using AMSOIL in everything I use with great results. It's on the pricey side but so are engine replacements.

To me you can't get much better than this . I've been using AMSOIL products for years without any regret.

I've been using Amsoil since the early mid 90s or so, started with my '86 Toyota Truck (that was the name Truck back then replaced the Stout and Hi-Lux) and it served me well. I had to use what is now called the Fumoto valve, but back then I just had one made for my truck because changing every 3k miles was putting some wear on my oil pan threads. I ended up giving the truck to my brother at 245k, but then he sold it...damn! Semi-fast forward, in the early 2000's I was getting into Auto X with my '91 BMW 318is (very hard to come by now...if you know, you know) so I replaced all the oil with Amsoil. I had Amsoil in the motor, trans and diff, changed the motor oil every 6k miles now, but still had a Fumoto valve (made life easier) and my trans and diff after every 3rd or so Auto x or track day. Fast forward to today, I'm now a preferred customer and still use Amsoil in my vehicles, Porsche 911, Subaru Outback XT, Camaro SS, Chevy Silverado even our Prius. I ended up selling most of those cars, but all of them had Amsoil in them, and on track days with the Camaro and 911 I would use the Amsoil Racing oil, then change back when done racing. I have tried Mobile One in my Silverado, but the oil analysis came back negative with more than usual metal particles in the oil, and this was the Extended Life Mobile One oil, changed at 7k miles. So I went back to Amsoil and eventually sold the truck. This past summer in TX I did a mix of 0/30 and 0/20 in my Outback, and all is well with the analysis, in fact it came back saying it is better than cars with the same miles, changed it at 6k miles, and was told to go to 7k miles. However, I'm keeping it to 6k miles, oil is still cheaper than a motor or another vehicle. I no longer race, but my Outback is now my only vehicle, so the miles do add up on it. I just purchase some differential oil for the front and rear differentials, which I'll be changing out the fluids soon, before it gets too cold.

Switched to this oil from Pennzoil and I won't ever run anything different. Great oil.

I've been using Amsoil signature series for quite sometime. Nothing close to the quality and performance of Amsoil.

Have been putting this in the new vehicle for the past 2 yrs. No issues, increasing mpg due to the reduced friction properties, and love the oil life.