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​Shop for AMSOIL Pi, Upper Cylinder Lubricant, Gasoline Stabilizer, DOMINATOR Octane Boost, Motorcycle Octane Boost and more

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P.i. Performance Improver Gasoline Additive
• Restores up to 14% horsepower1
• Reduces need for costly higher-octane fuel
• Reduces noise from carbon rap and pre-ignition
• Controls pre-ignition "knock"​
Upper Cylinder Lubricant
Your engine’s top-end is sparsely lubricated and prone to the development of performance-robbing deposits. It’s also highly susceptible to corrosion, an issue compounded by the prevalence of ethanol in today’s fuel. AMSOIL Upper Cylinder Lubricant is designed to solve those issues. Its AMSOIL-exclusive, powerful formulation helps maximize engine power and performance while increasing engine life. And unlike competing fuel additives, AMSOIL Upper Cylinder Lubricant works.​
Quickshot®
• Cleans powersports fuel systems
• Addresses ethanol-related performance issues
• Stabilizes fuel during short-term storage
Gasoline Stabilizer
• Helps keep fuel fresh up to 12 months
• Protects against varnish and gum buildup
• Fights ethanol corrosion
• Ideal for stored seasonal equipment such as snowmobiles, lawnmowers, motorcycles and boats
DOMINATOR® Octane Boost
Maximizes power and improves performance in all two-cycle and four-cycle gasoline engines.  Increases octane up to 4 numbers.  Reduces engine knock, improves ignition and engine response, helps fuel burn cleaner and inhibits corrosion.  Recommended for off-road and racing use.​
Motorcycle Octane Boost
Increases octane for power and efficiency. It is designed to improve startup performance and eliminate engine ping and knock for increased power at low-rpm operation. Contains detergents that help combustion chambers and fuel delivery systems maintain cleanliness for optimum performance.