Berryman Products 0116 B-12 Chemtool Carburetor, Fuel System and Injector Cleaner About this item: Lower your emissions and reduce maintenance costs by regularly using the B-12 Chemtool Fuel Injector Cleaner to restore fuel-injectors to their original spray pattern. It is comprised of a high-energy, solvent-based formula that quickly disperses moisture and dissolves gum, varnish and other fuel residues from the entire fuel system. Product details: Quickly dissolves petroleum residue Disperses moisture from fuel system, fuel injectors, valves, rings, and pistons High-energy solvent technology Ensures higher compression, fewer repairs, lower operating costs and increased spark plug and injector life Fuel treatment is catalytic converter and oxygen sensor safe