Berryman B-12 Chemtool Fuel Injector Cleaner 15oz (4-Pack) — Pour-In Formula Restores Performance

If your gasoline engine shows rough idling, sluggish throttle response or reduced fuel efficiency, a concentrated fuel system cleaner can remove deposits throughout the tank, lines, carburetor and injectors without disassembly. This listing is for a pack of four 15-ounce bottles of Berryman B-12 Chemtool, a formula designed to circulate with the fuel, break down residue and help maintain clean combustion chambers and fuel-delivery components.

How does this treatment work in a running engine?

Pour the recommended amount into the fuel tank; the additive blends with gasoline and travels through the entire fuel system as the engine runs. Its detergents and solvents target varnish, gum and carbon, loosening deposits so they can be burned away or flushed out of injectors and lines.

• Mixes directly with gasoline for no-teardown application
• Circulates through tank, fuel lines, carburetor and injectors
• Breaks down varnish and carbon to restore spray patterns

What parts of the fuel system does B-12 clean?

The formula is formulated to act on multiple fuel system components, not only the injectors. It helps remove residues from the fuel tank and lines while cleaning carburetor passages, intake valves and combustion chambers for more consistent combustion.

• Fuel injectors: restores proper atomization
• Carburetors and intake passages: clears deposits and jets
• Combustion chambers and rings: helps reduce build-up that affects efficiency

Will using this product improve drivability and maintenance intervals?

Regular treatment with a high-quality cleaner can support smoother idle and crisper throttle response by keeping fuel delivery components free of obstructing deposits. While results vary by vehicle and condition, ongoing maintenance can help protect sensors and catalytic systems by promoting more complete combustion.

• Aims to reduce rough idling and hesitation
• Helps maintain optimal injector and spark plug condition
• Safe for catalytic converters and oxygen sensors when used as directed

How often should I use the 15oz bottle and what does the 4-pack cover?

Typical dosing depends on tank size and the degree of contamination; follow label directions for specific mixing ratios. A single 15-ounce bottle treats multiple fuel fills for small engines or one fill for most passenger vehicles; the four-bottle pack provides several treatments or covers multiple vehicles and service intervals.

• Follow the product label for exact dosage per tank size
• One bottle can treat a full tank of a passenger car or provide several doses for smaller tanks
• Pack of four is cost-effective for frequent maintenance or fleet use

Who is this for: This 4-pack of Berryman B-12 Chemtool is aimed at DIY vehicle owners, hobbyists, and fleet managers who want a reliable, pour-in solution to keep gasoline engines running clean. It's suitable for cars, motorcycles, lawn and garden equipment and other gasoline-powered machinery where deposit removal and maintained fuel flow can improve everyday performance and help reduce maintenance needs. Always follow label instructions and safety recommendations when adding chemical treatments to your fuel system.