Shop AMSOIL Gasoline Fuel Additives

AMSOIL Motorcycle Octane Boost (MOB)

AMSOIL Motorcycle Octane Boost (MOB) 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. Motorcycle Octane Boost contains detergents that help combustion chambers and fuel delivery systems maintain cleanliness for optimum performance.... read more

Brand: AMSOIL • Product Code: MOB

Gasoline Stabilizer (AST)

It is difficult to drain all of the fuel from equipment before storage, and doing so would expose the system to other problems, including the formation of rust and corrosion on the bare metal in the tank and fuel system and the drying and cracking of gaskets and seals. Some fuels are pre-treated with oxidation inhibitors that allow them to be stored... read more

Brand: AMSOIL • Product Code: AST

Quickshot SE Additive & Stabilizer (AQS)

Degraded fuel presents a major maintenance issue in small engines and powersports equipment. It can form varnish, gum and insoluble debris that clog carburetors, fuel injectors and fuel filters. Carbon buildup can form on the tops of pistons that leads to pre-ignition, rough idling and poor throttle response. Fuel-related problems are only expected... read more

Brand: AMSOIL • Product Code: AQS

P.I Performance Improver (API)

Improves fuel mileage an average of 2. 3% and up to 5. 7%. Reduces emissions such as hydrocarbons (HC) up to 15%, carbon monoxide (CO) up to 26% and nitrous oxides (NOx) up to 17%. Restores power and performance. Reduces the need for costly higher octane fuel. Reduces noise from carbon rap and pre-ignition. Offers better vehicle drivability and... read more

Brand: AMSOIL • Product Code: API

Dominator Octane Boost (AOB)

AMSOIL DOMINATOR® Octane Boost (AOB) significantly increases engine response and power in all two- and four-cycle gasoline-fueled engines. Just one treatment reduces engine knock, improves ignition and helps fuel burn cleaner. DOMINATOR Octane Boost is the recommended octane boost for all high-performance off-road and racing applications. Most... read more

Brand: AMSOIL • Product Code: AOB

Upper Cylinder Lubricant (UCL)

The intense heat of combustion and limitations of the oil-control piston ring result in a lack of oil at the top of each cylinder. AMSOIL Upper Cylinder Lubricant's unique additives provide that missing lubrication to fight piston-ring and cylinder wear, maximizing engine compression and horsepower. Its lubricity improvers also aid in protecting fuel... read more

Brand: AMSOIL • Product Code: UCL