Motul Fuel System Clean gasoline additive 300ml — cleans injectors, valves & combustion chamber for restored throttle response

Motul Fuel System Clean is a concentrated 300ml gasoline additive designed to remove deposits from injectors, valves and combustion chambers to restore throttle response and smoother acceleration.

Keeping fuel-system deposits under control preserves performance and can prevent loss of power, rough idling and uneven throttle response. This Motul formula works through a single tankful: pour the 300ml bottle into the tank before refueling and drive normally while the cleaner circulates, dissolving gum, varnish and carbon residues across port and direct injection systems, carburetors, fuel lines and the combustion chamber.

How quickly will I notice improved throttle response and acceleration?

Many drivers observe smoother acceleration and crisper throttle response after one tank treated with this product, especially on higher-mileage engines or vehicles that haven’t been maintained with additives. Results vary with the level of buildup and driving conditions; progressive improvement is typical as the formula cleans injectors and restores proper spray patterns.

• Single 300ml dose treats up to 60 liters of gasoline.
• Designed to work during normal driving—no special procedure required.
• Most noticeable on engines with moderate to heavy deposit buildup.
• Repeat at regular service intervals for sustained performance.

Will Motul Fuel System Clean work in my fuel-injected or carbureted engine?

The formula is compatible with port-injected, direct-injected and carbureted gasoline engines, cleaning nozzle tips, intake valves and combustion chambers. It dissolves different types of fuel residues—gum, varnish and carbon—and helps the fuel atomize correctly for a more complete burn.

• Safe for naturally aspirated and turbocharged gasoline engines.
• Treats both injector tip fouling and valve deposits.
• Also effective as a carburetor cleaner for older vehicles.
• Suitable for use with standard gasoline and ethanol blends.

Can this product reduce emissions and protect catalytic converters?

By improving fuel atomization and combustion efficiency, the cleaner helps reduce unburned hydrocarbons in the exhaust stream, which can lower pollutant output. The formula is formulated to be safe for engines equipped with catalytic converters and helps reduce long-term stress on the exhaust after-treatment system by preventing deposit-related misfires and incomplete burns.

• Promotes cleaner combustion for fewer unburned hydrocarbons.
• Safe for use with catalytic converters when used as directed.
• Helps prolong fuel-system components and exhaust equipment life.
• Reduces deposit-driven rough running that can increase emissions.

How does it protect the fuel system from moisture and corrosion?

Motul Fuel System Clean contains dispersing agents that mix with small amounts of condensation in the tank and fuel lines, keeping water suspended so it passes harmlessly through the system instead of pooling and causing corrosion. The formula also provides temporary lubrication to protect pump and injector components during the cleaning process.

• Disperses tank condensation to reduce corrosion risk.
• Lubricates moving fuel-system parts while cleaning occurs.
• Prevents lifted particles from re-depositing on injectors and valves.
• Recommended more frequently for city driving or short-trip use.

Who is this for: Motul Fuel System Clean is aimed at car and small-boat owners who want an easy, preventative maintenance step to restore lost performance and protect fuel-system components. It’s especially useful for vehicles with higher mileage, engines showing hesitation or uneven idle, and for anyone seeking to maintain efficiency and reduce long-term wear without disassembly or workshop intervention.