Customer Ratings & Reviews

Have been using Amsoil 15-50 since I resurrected a 1992 mustang LX with. 5.0 stock motor for 3 years on various road race courses (Mid Ohio, NCM, Ozarks, Pitt raceway, Gingerman, etc with NASA. Superb lune and engine remains rock solid and pulls strong running at 6200 rpm changing oil after every 2 race weekends

Best oil to use. I use it on my motorcycle and never had a problem with the motor. I would recommend it to everyone

Great oil. No issues been using it for 7 + years. Perfect for how the engine is built to have good oil pressure at idle.

This is the only oil I will ever use on my 70 roadrunner motor runs cooler stronger, warms up faster better all positives

This is all I’ll use! When you have thousands dumped into a high horsepower build with with very tight specs and tolerances, I come to AMSOIL for my oil needs. The high content of phosphorous and zinc also help protect the investment. Oil is crucial to any build, no sense in going with anything but the best!

Keeping my race car running high RPMs with confidence. I have been using 15-50 for 2 years since engine rebuild. No pinging, oil pressure holding strong.

I have used Dominator race oil in my dirt track car for the last 10 years, I never had an oil related part failure or any excessive wear on any parts. My engine builder said what I’m using keep using it works.

Change it every 1,000-1,500 miles for my turbo LS daily driver.

My truck runs smooth and fuel mileage has increased.

I’ve used Thor racing oil for years in most engines I’ve assembled past couple years I’ve used both dominator and 4T with great results with very minimum wear when rebuild times roll around. Highly recommend either of these 2 oils. They also mix well with methanol and nitromethane.

Great Product I run in my Built Evo 8.

Definitely will Purchase again

I bought this oil to run in my modified racecar and it works great some of the cleanest oil I’ve ever saw after running for about 9 hours at 5500 to 6200 rpm most oil is black but this oil was still somewhat clean!

We all know it’s the good stuff. Shipping was fast.

Got into go-karts recently due to grandkids wanting them for Christmas. Not buying new Chinese Karts. Still American by the way. Started hunting for older, nostalgic karts, found 2 Manco Dingo's at a steal. Pretty bad shape mind you. Built a Honda GX160 with the parts included. Catastrophic things happen shortly thereafter. Side case comes loose Twice running engine dry both times and not a hint of damage to engine. I'm Impressed to say the least.

This product works great in my race engine.

If you're looking for an oil that provides the best quality and protection in the industry well Amsoil is it.

Excellent Have Never blown up a motor using this and doesn't slow down on the hot dyno runs

Love the product, run it in my classics and newer car.

I’m so glad I turned to 15/50 racing oil in my new build. It’s holding up great to the high RPM.