DOMINATOR 10W-40 Racing Oil

Because you requested it, we made it!! This is the newest in our racing oil lineup based on requests. It seems it may end up being the most popular because many impressed with the 15W-50 may want to switch to the 10W-40 for even better revving speed!

Amsoil DOMINATOR® 10W-40 Racing OilMulti-viscosity, shear-stable synthetic race formula engineered to maximize power while providing outstanding engine protection. Heavily fortified with zinc and phosphorus additives to protect critical surfaces in extreme conditions. Proprietary friction modifier maximizes power and reduces engine temperatures. Durable additive system is excellent for racing and street engines.

When you get to that last lap you’ll see the difference!! Give IT ITS ALL

AMSOIL DOMINATOR 10W-40 Synthetic Racing Oil is designed to protect high-performance racing applications operating on the ragged edge.
DOMINATOR is engineered to withstand the elevated rpm, high temperatures and shock-loading common to racing applications. Its
robust formulation is lab-crafted to provide maximum horsepower without sacrificing engine protection and has it been tested and validated by
championship-winning race teams. DOMINATOR provides straight grade protection in a multi-grade formulation!!

Printable Data Sheet on the Racing Oils Line

Download PDFProduct Datasheet

Product code : RD40QT-EA – Available in Quarts

Buy & Check PriceAnd Container Size


Buy in the Omaha AMSOIL Dealer store at 4211 S. 84th St. (Next to Wendy’s) or use this Online link to the Amsoil sale page if you are outside of the area.

Amsoil 10W-40 Racing Oil Fights Engine Wear

  • Durable formulation resists viscosity loss due to mechanical shear to maintain a strong protective oil film.
  • Heavily fortified with zinc and phosphorus anti-wear additives to provide additional protection against scuffing and wear in severe racing conditions.

10W-40 Racing to Maximize Horsepower

  • Formulated with a proprietary friction modifier to reduce energy lost to friction.
  • Delivers maximum horsepower and cooler engine temperatures, promoting improved lap times and longer-lasting components.

DOMINATOR is formulated with proprietary friction modifiers to reduce energy lost to friction. It delivers maximum horsepower and cooler engine temperatures, promoting
improved lap times and longer-lasting components. Dyno it yourself and see!


  • Low pour point offers excellent startup protection and provides less drag when the oil has not reached operating temperature.
  • Maintains superior film strength in extreme heat.
  • Thermally stable synthetic chemistry resists the effects of intense heat common to racing engines to provide reliable protection for the duration of the race.

See the product data sheet for full details.

If you are racing to win AMSOIL Dominator is KEY. If you are performing engine tests you want the engine to squeeze out all the power possible w/o added drag. The differences per Gail Banks is in the magnafluxing tests after the run! It’s that visible and drastic.

Product Reviews: Racing Oil Customers


By  BOBBY,  a  Verified Buyer  from  Palm harbor  on  February 06, 2024
This is the only oil I will ever use on my 70 roadrunner motor runs cooler stronger, warms up faster better all positives

Great for built engines!

By  TRAVIS,  a  Verified Buyer  on  December 20, 2023
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!