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Dominator® Synthetic 15W-50 Racing Oil (RD50)
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.
Package sizes include:

1-Quart Bottle
1-Quart Bottles (case of 12)
1-Gallon Bottle
1-Gallon Bottles (case of 4)
55-Gallon Drum
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.
Dominator Synthetic Racing Oil’s proprietary friction modifier provides reduced friction for maximum
TYPICAL PHYSICAL PROPERTIES

Dominator® Synthetic 15W-50 Racing Oil (RD50)
Kinematic Viscosity @ 100°C, cSt (ASTM D445)
17.5
Kinematic Viscosity @ 40°C, cSt (ASTM D445)
119.6
Viscosity Index (ASTM D2270)
162
Cold Crank Simulator Apparent Viscosity @ -35°C, cP (ASTM D5293)
6695 (-20)
Pour Point °C (°F) (ASTM D92)
-36 (-33)
Flash Point °C (°F) (ASTM D92)
234 (453)
Fire Point °C (°F) (ASTM D92)
248 (478)
Four-Ball Wear Test (ASTM D4172: 40kgf, 150°C, 1800 rpm, 1 hr) Scar diameter,
mm
0.47
Noack Volatility (ASTM D5800) 250°C for 1 hour, % weight loss
8.0
High Temperature/High Shear Viscosity cP, X°C, X s-1 (ASTM D4683)
5.4
Shear Stability Kurt Orbahn (ASTM D-6278),
% viscosity change 90 cycles.
6.3
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