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

SKU: RD40QT Category: Racing Motor Oils

DOMINATOR 10W-40 Synthetic 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 synthetic racing oil for even better revving speed! I could have used this one quite a while back.

Multi-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.

See the product data sheet for full details.

Download PDFProduct Datasheet

Product code: RD40QT-EA
Available in a 12-quart case or individual quarts.

Buy & Check Price& Bottle Sizes

Amsoil 10W-40 Racing Oil Fights Engine Wear

DOMINATOR Synthetic Racing Oil’s durable formulation resists viscosity loss due to mechanical shear to maintain a strong protective oil film. It is heavily fortified with zinc
and phosphorus anti-wear additives to provide additional protection against scuffing and wear in severe racing conditions.

10W-40 Synthetic Racing Oil to Maximize Horsepower

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.

Excellent All-Temperature Performance

DOMINATOR provides maximum protection in temperature extremes. Its low pour point offers excellent startup protection and provides less drag when the oil has not reached
stable operating temperatures. At elevated operating temperatures, it maintains superior film strength. DOMINATOR’s thermally stable synthetic chemistry resists the
effects of intense heat common to racing engines to provide reliable protection for the duration of the race.

Commercial Availability

Many oil companies produce specialty racing oils for elite groups and do not offer them to the general public. For example, several popular oil manufacturers produce
racing oils offered only to NASCAR* teams. DOMINATOR 10W-40 Synthetic Racing Oil is already formulated to a high level of performance. It provides maximum performance
and superior protection to all racers, regardless of their competition level. The same DOMINATOR Synthetic Racing Oil that is used in the engines of AMSOIL corporately
sponsored racers, including Bryce Menzies and Brad Lovell, is available to everyone.

10W-40 Racing Oil Applications

Use DOMINATOR 10W-40 Synthetic Racing Oil in domestic and import high-performance racing engines where an SAE 40 viscosity
oil is suitable, including (not limited to):

Asphalt late model
GM* crate late model
Dirt late model
Marine
Corvair performance driving
Modified Big Block
Sprint
Modified Small Block
Aluminum block

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.

Customer Reviews

Racing oil, 15W50

By DANIEL, a Verified Buyer from Northern KY on June 04, 2024

Off the bat I will say that this oil is the best dang oil I have ever used in my High HP engines. It is the only oil that doesn’t get beat to death by the engine. Also, having said that, it is the only oil that quieted the valve train too!! Its like a smooth sewing machine. My hot rod gets this oil ONLY, NO ACCEPTIONS. It runs smooth as silk and I have no issues AT ALL! AMSOIL certainly knows fluids on all levels. In my High Performance 1972 Monte Carlo (completely rebuilt by me and my life long friend, known as the “Magical Maestro Car Gnome”) has all AMSOIL product in the vehicle, gear oil, transmission fluid and of course the 15W50. I am completely amazed how well their fluids works. Once I run out of bearing grease, I will begin to use that too, among more of their other wonderful products. It may cost a tad more, but I rest easy knowing my vehicles are well protected with this wonder fluid. So its well worth it and it lasts longer! if you have a heavy hitter, High HP vehicle like me, then this stuff is it! Don’t even wait another second, just order it for your beast in the garage. YOU WILL BE PLEASED! Yours truly, Dan

Proof is in the pudding

By LARRY, a Verified Buyer from Texas on May 17, 2024

Recently made some changes to my 532ci. BBF and was going to replace the rod bearings while having it apart. After 3 seasons of 200’ mud drag racing, the bearings still looked new. Ended up putting them back in and looking forward to another race season, thanks to Amsoil Dominator Racing oil!

Best

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

Protection From Startup to the Checkered Flag

DOMINATOR provides maximum protection in temperature extremes. Its low pour point offers excellent cold-start protection and provides less drag when the oil has not reached stable operating temperatures. At elevated operating temperatures, it maintains superior film strength. DOMINATOR’s thermally stable synthetic chemistry resists the effects of intense heat common to racing engines to provide reliable protection for the duration of the race.