AMSOIL DOMINATOR® 5W-20 Racing Oil
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DOMINATOR® 5W-20 Racing OilHelp

DOMINATOR® 5W-20 Racing Oil Product Image
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$13.75 Retail Price (USD)
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Product Code: RD20QT-EA
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Provides superior performance and maximum protection in high-performance and racing applications. DOMINATOR is engineered from advanced synthetic technology to better withstand the elevated rpm, high temperatures and shock-loading common to racing applications.

PRODUCT DESCRIPTION
AMSOIL DOMINATOR® Synthetic 5W-20 Racing Oil (RD20) provides superior performance and maximum protection in high-performance and racing applications. DOMINATOR is engineered from advanced synthetic technology to better withstand the elevated rpm, high temperatures and shock-loading common to racing applications. Its robust formulation, tested and validated by championship race teams, is designed to provide maximum horsepower without sacrificing engine protection. DOMINATOR provides straight-grade protection in a multi-grade formulation.

AMSOIL, the leader in automotive synthetic lubrication, produced the world's first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL The First in Synthetics® to do the best job protecting your engine.

Anti-Wear Formulation
Racing and high-performance engines are typically modified to deliver maximum horsepower and speed. Their powerful designs create shearing forces that can cause lesser oils to lose viscosity, leaving bearings, pistons and other components vulnerable to wear and failure. 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 (see results below).

The piston crown contains normal carbon, while the rings remain clean and functional. Note the absence of wear or scuffing on the piston skirt.The camshaft shows little-to-no scoring, bluing or wear after 3,000 miles of high-performance racing.

 

Maximum Horsepower
The excessive friction and heat of racing robs engines of power and longevity. DOMINATOR is formulated with a proprietary friction modifier for maximum horsepower and cooler engine temperatures, promoting improved lap times and longer-lasting components.

  • Formulated specifically for racing & high-performance engines
  • Robust formulation resists viscosity loss
  • Proprietary friction modifier maximizes horsepower & torque
  • Fortified with anti-wear additives for extra protection

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.

Commercial Availability
Many oil companies produce specialty racing oils for elite groups and do not offer them to the general public. All AMSOIL synthetic motor oils are already formulated to a higher level of performance than competitors' oils, and AMSOIL DOMINATOR Synthetic Racing Oil is no exception. It provides maximum performance and superior protection to all racers, regardless of their level of competition. The same AMSOIL DOMINATOR Synthetic Racing Oil that is used in the engines of AMSOIL corporately sponsored racers, including Scott Douglas, Chad Hord and Brad Lovell are available to everyone.

APPLICATIONS
DOMINATOR 5W-20 Synthetic Racing Oil is recommended for modified small block, asphalt late model, bracket, midget and other domestic and import high-performance racing and street applications that require a 20-weight oil.

AMSOIL Ea® Racing Air Filters (EAAR) are specially designed for racing and street rod enthusiasts who desire AMSOIL Ea protection in carbureted applications. AMSOIL Ea Racing Air Filters are constructed with the same synthetic nanofiber media as other AMSOIL Ea Air Filters, providing maximum protection and extended filter life.

AMSOIL offers WIX Racing Oil Filters for racing applications. WIX racing filters are specially designed for racing applications only.

Oil Analyzers Inc®. (715-395-0222) is a division of AMSOIL that provides cost-effective, quality oil analysis services. For more information on product applications and service life,, refer to the AMSOIL Product Recommendation and Drain Interval Guide (G1490).

HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS). An MSDS is available via the Internet at www.amsoil.com or upon request at (715) 392-7101. Keep Out of Reach of Children. Don’t pollute. Return used oil to collection centers.

For warranty information, visit www.amsoil.com/warranty.aspx.

RD20 Package Sizes
Code Package Size Unit of Measure Product
RD20QT (RD20QT-EA) Quart Each DOMINATOR® Synthetic 5W-20 Racing Oil
RD20QT (RD20QT-CA) Quart Case of 12 DOMINATOR® Synthetic 5W-20 Racing Oil
RD2055 (RD2055-EA) 55-Gallon Drum Each DOMINATOR® Synthetic 5W-20 Racing Oil
More about AMSOIL Reviews

REVIEW SNAPSHOT®

by PowerReviews
AMSOILZ-ROD 20W-50 Synthetic Motor Oil
 
4.9

(based on 37 reviews)

Ratings Distribution

  • 5 Stars

     

    (35)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

96%

of respondents would recommend this to a friend.

Most Liked Positive Review

 

Z-ROD oil

I switched to ZROD oil for my vintage gto mainly for the zinc/phosphorus content. when I did I changed from a competitors 10w40 to amsoil 20w50 because of oil usage (believed to be...Read complete review

I switched to ZROD oil for my vintage gto mainly for the zinc/phosphorus content. when I did I changed from a competitors 10w40 to amsoil 20w50 because of oil usage (believed to be valve seal related) and oil consumption decreased significantly.

VS

Most Liked Negative Review

 

I would not buy this product again

They say it's designed for older engines but it's not. Once your engine is at operating temperature the oil pressure drops below 10psi at idle because the oil is just too thin.

They say it's designed for older engines but it's not. Once your engine is at operating temperature the oil pressure drops below 10psi at idle because the oil is just too thin.

Reviewed by 37 customers

Displaying reviews 1-10

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5.0

Nothing but the best for my 77 Corvette.

By 

from Bloxom VA

Verified Buyer

Comments about Z-ROD 20W-50 Synthetic Motor Oil:

Best oil period for my original flat tappet L-82 Corvette.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 1977 Corvette
 
5.0

Worth every penny

By 

from Phila, Pa

Verified Buyer

Comments about DOMINATOR 5W-20 Racing Oil:

Just have my race bike motor rebuilt and i could've used the old bearings they looked immaculate.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • Suzuki Hayabusa, Ram 1500

(1 of 1 customers found this review helpful)

 
5.0

Excellent zinc based oil

By 

from Huntsville,Alabama

Verified Buyer

Comments about Z-ROD 20W-50 Synthetic Motor Oil:

Bought this for a friend,he was looking for zinc based oil.
Engine has solid roller camshaft.
Mostly street duty,with some racing.
He's ready to buy more amsoil products for his other vehicles!!!

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • All kinds and types
 
5.0

Good American oil

By 

from Casper, wyoming

Verified Buyer

Comments about Z-ROD 10W-30 Synthetic Motor Oil:

I have a 2001 gmc sierra 2500hd with the lq4 6.0 vortec, it has a bigger cam, longtubes with x pipe, cat delete, 42 pound injectors and some other performance mods. The truck has 210,000 miles on it and runs very healthy. Ive always liked amsoil products, ive noticed i burn less oil on 2000 mile trips. Castrol was the worst burning 1qt every 500 miles, valvoline and mobil 1 were about 1qt every 1000 miles and amsoil signature was at a half qt at 1000-1200 miles all were 5w30s. The zrod i put about 5000 miles on and the biggest thing ive noticed was it has less blow by than other oils ive used, i have a catch can to determine that. With zrod i had maybe an 1/8th cup of oil in the catch can after 5000 miles, im used to a quater or half a cup. The only thing i wish amsoil had was a high zinc and phospherous oil that was something other than 10w30, 10w40 or 20w50. I would like to see more variety like a 5w30 high zinc oil for people like me in wyoming with 40 below winters and dont care about emissions. All in all Its a good American oil.

  • How would you describe yourself?:
  • I'm a full-on gearhead
 
5.0

I will except nothing less than Amsoil

By 

from Oceanside

Verified Buyer

Comments about DOMINATOR 10W-30 Racing Oil:

For using both our Spec Miata racecars.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • Maxda Miata racecars
 
5.0

WORKS LIKE A CHARM!

By 

from Denver co

Verified Buyer

Comments about Z-ROD 10W-30 Synthetic Motor Oil:

I love ams oil, and recently converted my truck to their z-Rod synthetic. My truck seems to idle better and run smoother. It also has a leaky valve seal and on start up will smoke a little bit, but after using this Z-rod it significantly stopped the smoking on start up!!!

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 90 Chevy 1500 5.7
 
5.0

High Mileage Engine

By 

from White Bluff Tn

Verified Buyer

Comments about Z-ROD 10W-30 Synthetic Motor Oil:

1st Time using this Z Rod oil if it's like everything else Amsoil makes I'm sure I'll be satisfied

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Cars Trucks Tractors small engines

(1 of 1 customers found this review helpful)

 
5.0

The best for internally modified LS

By 

from Quebec, Canada

Verified Buyer

Comments about Z-ROD 10W-30 Synthetic Motor Oil:

I use it bc of extra zinc to protect since the valvetrain is modified with a 231/236 duration 640 615' lift 11lsa in my LS3. Running strong since 1 year/ 8k miles with either Amsoil or Wix filter. I wont go back to cheap oil (like false synthetic with 50/50 blend on Canadian Tire shelves).

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • LS3 cammed
 
5.0

Will buy this oil again!

By 

from Groveland, Florida

Verified Buyer

Comments about Z-ROD 20W-50 Synthetic Motor Oil:

I have used this in my 1987 Silverado 5.0 with 250,000 miles on it for the last 20 years and, I still get 4500 miles to a quart and the engine is still quiet and has never been opened. Very happy with Amsoil!

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • "87" Silverado and a 2006 Malibu SS
 
5.0

the good stuff

By 

from iowa

Verified Buyer

Comments about Z-ROD 10W-30 Synthetic Motor Oil:

This oil always maintaines 3 to 4 lbs oil pressure more than the last oil I used. Since I had my ZL-1 modified to 940HP at the crank I needed the best oil I could find. I do change the engine oil and rear end lube more often than normal but its worth it!

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 2015 camaro ZL-1

Displaying reviews 1-10

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