Berryman B-12 Chemtool Fuel System & Injector Cleaner, 3-Pack 15 oz — H.E.S.T. Formula for Deposits & Moisture

Berryman B-12 Chemtool is a concentrated fuel-system cleaner that breaks up gum, varnish and moisture to help restore fuel flow, injector performance and combustion efficiency.

If your engine shows reduced throttle response, rough idling, or you want to prevent fuel-system buildup before it becomes a problem, this 15‑ounce Berryman B-12 Chemtool formula treats the entire gasoline system. Formulated with High-Energy Solvent Technology (H.E.S.T.), it dissolves deposits in tanks, lines, carburetors, injectors, intake ports and valves while safely dispersing water in conventional gasoline. This listing is for a three-pack of the 15 oz single-unit cans suitable for consumer and light commercial use.

How does Berryman B-12 Chemtool help when fuel injectors look clogged?

The cleaner penetrates and dissolves varnish and gum that restrict spray patterns and flow. By removing these residues, injectors can return closer to their original spray and delivery characteristics, improving combustion consistency.

• High-Energy Solvent Technology dissolves sticky deposits.
• Treats injectors, intake ports and combustion chambers.
• Helps restore more uniform injector spray and atomization.
• Safe for catalytic converters and oxygen sensors when used as directed.

Will this product protect my fuel tank and lines from moisture and corrosion?

Berryman B-12 rapidly disperses water found in conventional gasoline so it can pass harmlessly through the fuel system. Reducing free moisture lowers the chance of rust and microbial growth that can form in tanks and lines.

• Breaks up free water so it moves through the fuel system.
• Limits conditions that promote tank and line corrosion.
• Helps maintain steady fuel flow to the engine.

How often should I use this cleaner to maintain performance?

Frequency depends on driving conditions and fuel quality, but routine use every few thousand miles or during seasonal storage helps keep deposits from accumulating. Follow the product directions for concentration and application based on tank size.

• Use at regular maintenance intervals (manufacturer recommends frequency on label).
• Ideal for preventive treatment before long storage or after poor-quality fuel fill-ups.
• Available in consumer and commercial sizes for different maintenance schedules.

Is B-12 Chemtool safe for modern engines and emissions systems?

The formula is designed to be catalytic converter and oxygen sensor safe when used according to instructions. It targets organic fuel residues without introducing compounds known to damage emission-control components.

• Formulated to be compatible with catalytic converters and oxygen sensors.
• Works with carbureted and fuel-injected gasoline engines.
• Follow dosage and safety directions printed on the can for best results.

Who is this for: Berryman B-12 Chemtool 15 oz (3-pack) is intended for vehicle owners, DIY mechanics, fleet operators and small shops seeking a concentrated, fast-acting solution to fuel-system deposits. It’s useful for older vehicles with carburetors as well as modern fuel-injected engines that need periodic deposit control. Choose this product if you want a solvent-based treatment that disperses water, targets varnish and gum, and is sold in a convenient single-unit size for routine maintenance or spot treatments.