B&G 44K Fuel System Cleaner 3-Pack — Concentrated Gasoline Additive for Injectors, Intake Valves, Improved Throttle Response

B&G 44K Fuel System Cleaner (3 pack) is a concentrated gasoline additive designed to remove deposits from injectors, intake valves and combustion chambers, restoring throttle response and fuel efficiency.

Use B&G 44K as a preventative and corrective treatment for gasoline engines: pour the bottle into a near-empty tank and fill with gasoline to circulate the formula through the entire fuel system. The concentrate targets upper-engine deposits that cause hesitation, surge, rough idle and reduced power, while remaining compatible with alcohol-blended fuels, fuel system materials and catalytic converters.

How quickly will I notice performance improvements?

Many drivers see smoother throttle response and reduced hesitation after a single tank treated with B&G 44K, though heavily fouled systems may need repeated use. The cleaner works as the treated fuel passes through injectors, intake ports and combustion chambers to dissolve carbon and varnish.

• Treats up to 20 gallons (75 liters) per bottle for full-tank cleaning.
• One bottle per tank often produces measurable drivability gains.
• Severe deposits may require multiple treatments spaced between fill-ups.
• Safe with alcohol-blended fuels and existing fuel additives.

Will it harm my engine, sensors, or emissions equipment?

B&G 44K is formulated to be safe with fuel system materials, oxygen sensors and catalytic converters when used as directed. It contains no alcohol and is compatible with common fuel additives, minimizing risk when combined with routine maintenance products.

• Catalytic converter and oxygen sensor safe under normal use.
• No alcohol in the formula, reducing corrosion concerns.
• Compatible with injectors, fuel lines, pumps and seals.
• Works with direct injection and port-injected engines alike.

How do I use the 3-pack most effectively?

Pour one bottle into a near-empty gasoline tank, then fill the tank to allow the cleaner to mix and circulate through the system. For ongoing maintenance, treat at regular intervals or whenever you notice driveability issues.

• Treats one tank per bottle; three bottles give multiple treatments or service multiple vehicles.
• Use before fuel system-related symptoms like stumble or surge appear for preventative care.
• For heavy buildup, schedule consecutive treatments across two or three fill-ups.
• Store bottles upright and sealed; follow local disposal guidelines for empties.

Is this product compatible with modern engines and fuels?

B&G 44K was developed for modern gasoline engines, including direct-injection systems, and works with ethanol-blended fuels and other common additives. Its formulation focuses on dissolving coked injectors and corrosive deposits without degrading fuel system components.

• Recommended for direct injection, port injection and older gasoline engines.
• Safe with E10 and typical ethanol blends used in consumer fuels.
• Maintains compatibility with aftermarket fuel treatments and octane boosters.
• Effective on fuel sending units and other upper-fuel-system components.

Who is this for: B&G 44K Fuel System Cleaner (3 pack) is aimed at vehicle owners, fleet managers and mechanics who want a reliable, concentrated treatment to restore engine response, reduce deposit-related drivability issues and maintain fuel economy. It’s useful for single-vehicle owners wanting periodic maintenance, shops needing quick corrective treatments, and anyone running direct-injection engines or ethanol-blended fuels who prefers a trusted professional-grade product.