Berryman B-12 Chemtool Fuel Injector Cleaner 3-Pack (3 x 15 oz) — Professional-strength deposit remover, catalytic-converter safe

Berryman B-12 Chemtool is a professional-strength pour-in fuel system cleaner that dissolves gum, varnish and carbon deposits to help restore fuel flow in gasoline engines.

Designed for use as an in-tank treatment, this three-pack contains three 15 fl oz bottles of Berryman B-12 Chemtool. The formula is engineered to travel through the entire fuel system—treatment moves from the tank through fuel lines, carburetors and injectors—targeting deposits that impede atomization and throttle response. This product is intended to be safe for catalytic converters and oxygen sensors when used as directed.

How does B-12 Chemtool improve engine performance?

The cleaner works by softening and dissolving built-up varnish, gum and carbon so those residues can be burned away or flushed out during normal operation. Removing these deposits helps the fuel spray pattern return to its designed shape, which supports more complete combustion and steadier idle behavior.

• Restores fuel atomization for more consistent combustion
• Helps reduce rough idling and throttle hesitation
• Supports longer service life for injectors and spark plugs
• Catalytic converter- and oxygen sensor-safe formulation

How do I use this pour-in fuel system cleaner?

Pour the recommended dose into a near-empty fuel tank before refueling so the treatment mixes evenly with fresh gasoline. Run the engine normally to allow the cleaner to circulate through fuel lines, the carburetor or injectors, intake valves and combustion chambers.

• Add one 15 oz bottle per treatment as directed on the label
• Use with a tank low enough to ensure proper dilution on refill
• Treat while driving normally to let the product reach all components
• Repeat periodically for maintenance or when performance symptoms appear

What parts of the fuel system does this product target?

B-12 Chemtool is formulated to reach and act upon multiple fuel system areas without disassembly. It addresses deposits in the tank, lines, carburetor passages, fuel injectors, intake valves and combustion chambers to help restore consistent fuel delivery and combustion.

• Fuel tank residue and varnish
• Fuel lines and filter-adjacent passages
• Carburetor jets and passages
• Fuel injector tips, intake valves and combustion chamber carbon

Who is this for: This three-pack is aimed at drivers, DIY mechanics and fleet operators who want a convenient, professional-strength treatment to help remove fuel system deposits and sustain engine responsiveness between services. It’s a practical maintenance product for gasoline-powered cars, light trucks and small engines, particularly if you notice rough idle, hesitation, or reduced fuel efficiency. Always follow the label directions and safety guidance when using automotive chemical products.