AMSOIL DOMINATOR® 100% Synthetic 2-Stroke Racing Oil
Race-proven, anti-friction chemistry provides an extra measure of protection against piston scuffing and bearing wear. Superior film strength provides protection in engines that can exceed 10,000 rpm. Burns clean; helps prevent ring sticking and plug fouling. Suitable for use with exhaust power valves.
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Product data sheets
View, download, or save a copy of the Product Data Sheet or Safety Data Sheet for AMSOIL DOMINATOR® 100% Synthetic 2-Stroke Racing Oil.
AMSOIL Snowmobile Oil Testing: Real-World Engine Teardowns and Dyno Results
Available sizes
Product code
Package size
Unit of measure
TDRQT-EA
Quart
Each
TDRQT-CA
Case of 12 Quarts
Case of 12
TDR1G-EA
Gallon Jug
Gallon Jug
TDR16-EA
16 Gallon Keg
16 Gallon Keg
TDR55-EA
55 Gallon Drum
55 Gallon Drum
AMSOIL DOMINATOR® 100% Synthetic 2-Stroke Racing Oil
AMSOIL DOMINATOR 100% Synthetic 2-Stroke Racing Oil is a race-only premix and oil-injection two-stroke oil engineered for high-output engines that operate on the edge of detonation, heat, and rpm. The formulation is built on higher-viscosity synthetic base oils paired with race-proven anti-friction chemistry and high-temperature detergents, and it is designed for stock or modified two-stroke engines that call for an API TC oil. DOMINATOR is the pick for serious moto X, snocross, kart, personal watercraft, and outboard race programs that prioritize finishing the run over saving a few cents per gallon.
Film strength for high-heat, high-rpm motors
High-performance and race-designed two-stroke engines run higher compression ratios, higher rpm, and leaner combustion than stock motors, and all three increase heat and pressure inside the cylinder. Light oils can burn off under that load, allowing rapid piston expansion that closes piston-to-cylinder wall clearance and raises the risk of scuffing or seizure. DOMINATOR is purpose-built around carefully selected, higher-viscosity synthetic base stocks that hold film strength under the heat and pressure common to race engines, including units that exceed 10,000 rpm.
Anti-friction chemistry that protects rings and bearings
Race-proven anti-friction chemistry adds an extra measure of protection against piston scuffing and crankshaft bearing wear and pitting. The same anti-friction package supports the maximum power output racers expect from a premium two-stroke oil and works on both coated and non-coated racing pistons.
Clean-burning detergent system
The oil and fuel burned in two-stroke combustion leave deposits on the pistons, rings, and combustion chamber. Excessive deposits can cause ring sticking, exhaust port blocking, and pre-ignition, all of which rob power and shorten engine life. DOMINATOR is formulated with clean-burning synthetic base oils and powerful high-temperature detergent additives for exceptional deposit control, helping keep ring lands free, exhaust ports clear, and combustion chambers clean across long race weekends.
Compatible with power valves, racing fuels, and piston coatings
The formulation is suitable for use with exhaust power valves, high-octane racing fuels, and both coated and non-coated racing pistons. DOMINATOR is also compatible with most other two-stroke oils, although mixing brands should be minimized to preserve the additive system.
Pre-mix and oil-injection ready at the API TC standard
DOMINATOR is engineered for use in oil-injected and pre-mix applications that call for API TC oils. In pre-mix applications, the oil delivers outstanding protection at 50:1, which works out to 2.6 oz of oil per US gallon of gas, although many racers modify the mix ratio to suit their tune. The product is not suitable for use with alcohol or nitro-methane fuels.
Cold-flow and pour point
The synthetic base-oil package keeps the pour point at -54 C (-65 F) per ASTM D97, supporting clean cold-morning starts on race weekends and helping pumped oil-injection systems continue to deliver oil to the bearings on the first kick or pull.
Recommended applications and service intervals
DOMINATOR is built for high-performance stock or modified two-stroke engines, including air- or liquid-cooled snowmobiles, personal watercraft, motorcycles (moto X), ATVs, go-carts, and outboard motors. Match the right two-stroke oil for the machine with the AMSOIL Vehicle Lookup Guide before ordering.
Pre-mix: 50:1 (2.6 oz of oil per US gallon of gas) delivers outstanding protection in API TC pre-mix applications, although many racers modify the ratio to match their setup.
Oil-injection: approved for use in oil-injected applications that call for an API TC oil.
Outboard motors: not suitable for long-term use as a TC-W3-type oil, although excellent as a race oil for short-term use where motors are periodically inspected.
Excluded fuels: not suitable for use with alcohol or nitro-methane fuels.
DOMINATOR is compatible with most other two-stroke oils, but mixing brands should be minimized. Aftermarket oil additives are not recommended for use with AMSOIL synthetic two-stroke oils. The formulation is good for use with coated or non-coated racing pistons, high-octane racing fuels, and exhaust power valves.
Typical technical properties
Property
Value
Kinematic Viscosity at 100 C, cSt (ASTM D445)
7.0
Kinematic Viscosity at 40 C, cSt (ASTM D445)
35.2
Viscosity Index (ASTM D2270)
166
Pour Point, C (F) (ASTM D97)
-54 (-65)
Flash Point, C (F) (ASTM D92)
94 (201)
Fire Point, C (F) (ASTM D92)
94 (201)
Order DOMINATOR 2-Stroke Racing Oil
DOMINATOR 100% Synthetic 2-Stroke Racing Oil is available in a quart bottle (TDRQT-EA), a case of 12 quarts (TDRQT-CA), a gallon jug (TDR1G-EA), a 16-gallon keg (TDR16-EA), and a 55-gallon drum (TDR55-EA) for shop and race-program use. The product is Warranty Secure: it is a high-performance replacement for vehicle manufacturer-branded products and is backed by the AMSOIL Limited Warranty. Match the right grade for the machine with the AMSOIL Vehicle Lookup Guide, review premix and 4-stroke options for race bikes in the Dirt Bike Oil Guide, then order AMSOIL DOMINATOR 100% Synthetic 2-Stroke Racing Oil.
I have just started using this product. I’ve been using MerCruiser Quicksilver. My problem is my wrist pins are getting hot and exploding the bearings. My little motor spins around 20,000 RPMs so hopefully this product will solve that problem. Thank you.
By Scott from Kentucky on May 23, 2026.
Would recommend this to a friend.
racing fluid for 2 strokes
works great no smoke pertects engine very good racing with this for years
By Steven from 07438 on May 13, 2026.
Would recommend this to a friend.
Dominator
I will use nothing but this in all my ultra light two stroke motors. Nothing compares to it, I even had a motor seizure because I forgot to turn on the oil lever and it was so well lubricated from the previous flight that it did not tear up the hole motor like it should've done.
DOMINATOR 2-Stroke Racing Oil is engineered specifically for high-performance and race-designed two-stroke engines. It pairs higher-viscosity synthetic base oils with race-proven anti-friction chemistry and a clean-burning detergent system, so it holds up under the higher compression, higher rpm, and leaner combustion that race tunes demand.
What is the difference between DOMINATOR and INTERCEPTOR?
DOMINATOR is the race-only formulation, built around higher-viscosity base oils and an anti-friction package targeted at high-output, high-rpm engines, including modified motors that exceed 10,000 rpm. INTERCEPTOR is the AMSOIL synthetic two-stroke oil for general snowmobile and personal watercraft use rather than wide-open race service, so DOMINATOR is the pick for race programs while INTERCEPTOR fits trail and recreation duty.
Can DOMINATOR and INTERCEPTOR be mixed?
DOMINATOR is compatible with most other two-stroke oils, including INTERCEPTOR, although mixing brands or grades should be minimized to preserve the race-tuned additive system in DOMINATOR. For best results, the system should be run down on one oil before refilling with the other.
How much DOMINATOR is needed at 50:1?
At a 50:1 pre-mix ratio, the recommended dose is 2.6 oz of DOMINATOR per US gallon of gas, which delivers outstanding protection in API TC pre-mix applications. Many racers modify the mix ratio to suit their setup, intake tract, and crankcase volume.
Can DOMINATOR be used in oil-injection systems?
Yes. DOMINATOR is approved for use in oil-injected and pre-mix applications that call for an API TC oil. The synthetic base stock pumps cleanly through injection systems, and the pour point of -54 C (-65 F) supports cold-morning oil delivery before the engine reaches operating temperature.
Is DOMINATOR compatible with exhaust power valves and racing fuels?
Yes. DOMINATOR is suitable for use with exhaust power valves, high-octane racing fuels, and both coated and non-coated racing pistons. The detergent system targets the carbon deposits that cause ring sticking and exhaust port blocking, helping keep power valves moving freely.
Will running DOMINATOR void a factory warranty?
No. DOMINATOR 2-Stroke Racing Oil is Warranty Secure, meaning it is a high-performance replacement for vehicle manufacturer-branded products and is backed by the AMSOIL Limited Warranty. Using AMSOIL synthetic lubricants does not void a new vehicle or equipment manufacturer warranty.
