B&G Fuel System Cleaner 3-Pack — Concentrated injector and valve treatment, 20‑gal dose per bottle

B&G 44K Fuel System Cleaner (3-pack) is a concentrated gasoline treatment that cleans fuel injectors, intake valves, ports and combustion chambers to help restore engine performance and reduce deposit-related drivability issues.

This three-pack of B&G 44K is formulated to be added directly to a gasoline tank and works throughout the fuel system to remove upper-engine deposits that cause hesitation, surging, stalling and power loss. The formula is compatible with alcohol-blended fuels, common fuel additives and all fuel system materials, and it’s safe for catalytic converters and oxygen sensors. Each bottle is sized to treat up to 20 gallons (75 liters) of gasoline for a full-dose cleaning cycle.

How does this cleaner affect performance on a clogged engine?

When deposits build up on injectors, intake valves and combustion chambers, airflow and fuel spray patterns suffer—leading to rough idle, hesitation or reduced power. B&G 44K works to dissolve and disperse those deposits so the engine regains smoother operation and more consistent throttle response. Results vary by condition and driving, but many users notice improved driveability after a single treatment.

• Targets fuel injectors, intake valves, ports and combustion chambers
• Helps reduce surge, stumble, and hesitation caused by deposits
• Formulated for direct-injection and port-injected engines

How do you use the 3-pack correctly?

Each bottle treats up to 20 gallons (75 liters) of gasoline; add one bottle to a near-empty tank and then fill the tank to mix the product throughout the system. For heavier buildup, follow manufacturer guidance by running a full treatment per tank or as recommended. Do not mix with strong aftermarket additives unless compatibility is known.

• Add one bottle to the fuel tank before filling with gasoline
• One bottle treats up to 20 gallons (75 liters) of fuel
• Repeat treatments as needed for severe deposits or maintenance

Is B&G 44K safe for modern engines and emissions systems?

The formula is designed to be compatible with common fuel system materials and is safe for catalytic converters and oxygen sensors when used as directed. It contains no alcohol and is formulated to work with alcohol-blended fuels and routine fuel additives. Always follow local disposal and handling regulations and observe product warnings on the label.

• Catalytic converter and oxygen sensor safe when used per instructions
• Compatible with alcohol-blended fuels and common additives
• No alcohol in the formulation itself

How quickly will I see fuel economy or drivability improvements?

Some users notice improved throttle response and fewer hesitations after one treatment, while fuel economy gains depend on the level of deposit buildup and driving habits. For vehicles with heavy deposits, a series of treatments may be necessary to fully restore peak efficiency. Regular use as part of preventive maintenance can help maintain cleaner injectors and stable performance over time.

• Possible immediate drivability improvement after one dose
• Fuel economy improvement varies by vehicle condition and driving style
• Multiple treatments may be beneficial for severe deposit accumulation

Who this product is for: B&G 44K Fuel System Cleaner 3-pack is intended for vehicle owners, fleet managers and professional technicians who want a concentrated, non-alcohol cleaner that treats gasoline tanks up to 20 gallons (75 L) per bottle. It’s a practical choice for drivers of direct-injection and port-injected gasoline engines who are addressing deposit-related performance issues or using regular maintenance treatments to preserve engine responsiveness and efficiency. Note: This product contains chemicals known to the State of California to cause cancer and reproductive harm; follow all label warnings and local regulations when using and storing the product.