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).

Piston Cam
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
AMSOILDOMINATOR 10W-30 Racing Oil
 
4.9

(based on 65 reviews)

Ratings Distribution

  • 5 Stars

     

    (62)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

98%

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 65 customers

Displaying reviews 1-10

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5.0

Best oil

By 

from Hernando Beach FL

Verified Buyer

Comments about DOMINATOR 10W-30 Racing Oil:

I 've used the racing oil since 2005 in the 4. Cyl class and the 2.5 mod class and have never had I oil related problem. Would recommend to anyone. Simply the best

  • How would you describe yourself?:
  • I'm a professional mechanic
  • What kind of vehicle/equipment do you have?:
  • A Class inboard hydro plan
 
5.0

Best racing oil on the market

By 

from Horicon Wisconsin

Verified Buyer

Comments about DOMINATOR 15W-50 Racing Oil:

Engine builder has told me that our oil program is one of the best he has seen.

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

The only oil I use in my 1949 Kaiser.

By 

from Wellborn, Fl.

Verified Buyer

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

I don't drive my Kaiser much, but using Amsoil Zrod oil I only need to change my oil once a year. This oil protects my flat tappet cam.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 1949 Kaiser Deluxe

(1 of 1 customers found this review helpful)

 
5.0

A long time user

By 

from Gainesvile, Ga.

Verified Buyer

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

I've been using Amsoil since the early 70's. Everything from my air compressors to my boat motor.
Never had one single issue with anything I ever used it on! One of my air compressor I bought in the early 70's.. I still have the very same compressor and it has NEVER let me down!!
One of my service trucks had over 368,000 miles on the motor when I sold it. Never used a drop of oil between oil changes, and didn't even smoke a bit! The oil I just bought is what I use in both my cars.Will I ever use another brand of oil? NO WAY!!
My motorcycle has over 322,000 miles on it and never.. NEVER used a drop of oil, never leaked, and most important, never let me down! (and no, it's not a Harley!)
I've talked a lot of people into going with Amsoil over the years and they have thanked me for it many times.
It's by far the best oil I have ever used and will never use anything else!

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • cars, boats, motorcycles, air compressor
 
5.0

Top Notch

By 

from Elyria, OH

Verified Buyer

Comments about DOMINATOR 10W-30 Racing Oil:

Definitely a great oil for machines that take a lot of abuse. I use this in my dirtbikes and have seen a noticeable decrease in ware. I have run Pennzoil for a while just because it's cheap, but this product has shown me that you really do get what you pay for.

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 2007 Honda CR125R, 2014 Honda CRF250R
 
5.0

I would recommend this oil to anyone!

By 

from Newport News

Verified Buyer

Comments about DOMINATOR 15W-50 Racing Oil:

Highly recommended for racing. My bearings after 16 races looked brand new. I wouldn't run anything different.

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

z rod 20w/50 best oil for my boats

By 

from saratoga ny

Verified Buyer

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

I switched my vintage 327f motors over to this oil in the spring - just did my winter oil change and love this product and the service I receive - ordered on a Monday arrived on the door step Wednesday ..great product and great customer service - thank you

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • boats/ski doo/john deere /ford trucks /s
 
5.0

Best product for the money

By 

from York pa

Verified Buyer

Comments about DOMINATOR 15W-50 Racing Oil:

Run it in my race engines and I do not see the wear with this product as with other brands

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

So far so good

By 

from Denver

Verified Buyer

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

Trying it out on my air cooled VW buggy. Have only gone 200 miles but already noticed my oil pressure is 5-10 lbs better at idle on 90 degree day.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • VW dune buggy
 
5.0

Awesome product!!!

By 

from Miami FL

Verified Buyer

Comments about DOMINATOR 10W-30 Racing Oil:

Bought this for my built sleeved coyote and works super well running the car on e85

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • 2014 Mustang GT

Displaying reviews 1-10

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