PRODUCT DESCRIPTION
AMSOIL Dominator® Synthetic 15W-50 Racing
Oil (RD50) provides superior performance
and maximum protection in high-performance
and racing applications. Formulated to
withstand the elevated RPM, high
temperatures and shock-loading common to
racing applications, Dominator Synthetic
15W-50 Racing Oil delivers superior
performance and maximum protection in
extreme conditions. Its shear-stable
formulation was engineered to provide
maximum horsepower without sacrificing
engine protection. Dominator Synthetic
15W-50 Racing Oil 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.
MAXIMUM DURABILITY, MAXIMUM WEAR
PROTECTION
AMSOIL Dominator Synthetic Racing Oil
features an additive package heavily
fortified with zinc and phosphorus for
superior long-term wear protection.
Designed for maximum durability, it ensures
critical engine components are protected
for the duration of the race. Dominator
Synthetic Racing Oil’s superior additive
technology provides unmatched durability in
extreme conditions. In addition, its high
levels of zinc and phosphorus additives
make it ideal for street rods, muscle cars
and other vehicles with flat-tappet
cams.

SUPERIOR
PERFORMANCE
Dominator Synthetic Racing Oil’s
proprietary friction modifier provides
reduced friction for maximum power and
cooler engine temperatures, resulting in
improved lap times and longer-lasting
equipment.
PROTECTION FROM STARTUP TO THE
CHECKERED FLAG
Dominator Synthetic 15W-50 Racing Oil’s
multi-viscosity design provides maximum
protection in temperature extremes.
Dominator Racing Oil offers excellent
coldstart protection and provides less drag
when engine oil has not reached stable
operating temperatures. It maintains
superior film strength during
high-temperature operation on the
track.
SUPERIOR-QUALITY OILS, NO
DISCRIMINATION
Many oil companies produce specialty racing
oils for elite groups and do not offer them
to the general public. For instance,
several popular oil manufacturers produce
racing oils offered only to NASCAR racers.
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 and Brady Smith, are
available to everyone.
APPLICATIONS
AMSOIL Dominator Synthetic 15W-50 Racing
Oil is recommended for high-rpm,
high-horsepower, turbo/supercharged,
gasoline- or alcohol-burning, nitro-fueled
or nitrous oxide gas-injected applications
operated under severe conditions.
Applications
include, but are not limited to, the
following:
• Asphalt Late Model • Dirt Late Model •
Modified Big Block • Ford Crate Late Model
• Dodge Crate Late Model • Endurance •
Rally • Sprint • Truck-Pull • Aluminum
Block • Marine • Other high-performance
racing and street applications requiring
50-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 EaAR 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
upon request at 715-392-7101 or via the
Internet at www.amsoil.com. Keep Out of
Reach of Children. Don’t pollute. Return
used oil to collection centers.
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TYPICAL
TECHNICAL
PROPERTIES
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Dominator® Synthetic
15W-50 Racing Oil
(RD50)
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Kinematic
Viscosity @ 100°C, cSt
(ASTM D-445)
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17.5
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Kinematic
Viscosity @ 40°C, cSt
(ASTM D-445)
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119.6
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Viscosity
Index (ASTM D-2270)
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162
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CCS
Viscosity (°C), cP (ASTM
D-5293)
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6695
(-20)
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Pour Point
°C (°F) (ASTM D-97)
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-36
(-33)
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Flash Point
°C (°F) (ASTM D-92)
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234
(453)
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Fire Point
°C (°F) (ASTM D-92)
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248
(478)
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Four Ball
Wear Test
(ASTM D-4172B: 40 kgf,
75°C, 1200 rpm, 1 hr),
Scar, mm
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0.47
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Noack Volatility, %
weight loss (g/100g)
(ASTM D-5800)
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8.0
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Shear
Stability Kurt Orbahn
(ASTM D-6278),
% viscosity change 90
cycles.
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6.3
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High-Temperature/High-Shear
Viscosity,
150ºC, 1.4x106s-1, cP (ASTM
D-5481)
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5.4
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