- Excellent film strength
for high heat, high-rpm motors
- Anti-friction formula for
- Burns clean; helps prevent
ring sticking and plug fouling
- Protects coated and
non-coated racing pistons
Two-Cycle Engine Applications and Lubrication Needs
Excellent Lubricity and Film
High-performance and race-designed two-cycle engines
operate under severe conditions. They are modified
for higher compression ratios, higher rpm and leaner
combustion, all of which increase heat and pressure.
High heat can quickly burn off light oils and cause
rapid piston expansion, decreasing
piston-to-cylinder wall clearances and increasing
the likelihood of piston scuffing and seizure. High
pressure can exceed the film strength of
low-viscosity oils, which promotes crankshaft
bearing wear and pitting.
DOMINATOR is purpose-built for
outstanding film strength and lubricity. It is
engineered with carefully selected, higher-viscosity
synthetic base oils to withstand the high heat and
pressure common to high-performance and racing
applications. DOMINATOR's anti-friction chemistry is
race-proven to provide an extra measure of
protection against piston scuffing and bearing wear.
See teardown photos below.
The oil and fuel burned in the two-cycle combustion
process leave destructive deposits on the pistons,
rings and in the combustion chamber. Excessive
deposits can lead to catastrophic engine problems,
including ring sticking, exhaust port blocking and
AMSOIL DOMINATOR is formulated
with clean-burning synthetic base oils and powerful
high-temperature detergent additives for exceptional
deposit control. It helps prevent the power-robbing
carbon deposits that cause ring sticking, exhaust
port blocking and pre-ignition. AMSOIL DOMINATOR is
optimized for severe service.
RACING IS RESEARCH™
AMSOIL disassembled the Rotax motor from Scheuring
Speed Sports' Ski-Doo race snowmobile ridden by
Robbie Malinoski during the 2010/2011 professional
snocross tour. Both pistons revealed minimal wear
and were suitable for continued use. AMSOIL
DOMINATOR delivered outstanding protection for
Malinoski's Ski-Doo in the most severe environment.
DOMINATOR is recommended for use in high performance
stock or modified two-cycle motors, including air-
or liquid-cooled snowmobiles, personal watercraft,
motorcycles (moto X), ATVs, go-carts and outboard
motors*. Good for use with coated or non-coated
pistons, high-octane racing fuels and exhaust power
valves. Compatible with most other two-cycle oils;
however, mixing oils should be minimized.
Use in oil-injected and pre-mix
applications where API TC oils are specified. In
pre-mix applications, DOMINATOR delivers outstanding
protection at 50:1 pre-mix ratios (2.6 oz. oil per
U.S. gallon of gas), although many racers modify the
mix ratio to suit their setup. Not suitable for use
with alcohol or nitro-methane fuels.
* Not suitable for long-term use
in outboard motors as a TC-W3 type oil, although
excellent as a race oil for short-term use where
motors are periodically inspected.
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 on the
Corporate AMSOIL website MSDS page. Keep Out of Reach
of Children. Don’t pollute. Return used oil to collection
For warranty information, visit the
Corporate AMSOIL website warranty page.