Hi-Gear Product's close working relationship with key additive manufacturers and OEMs allows Hi-Gear access to the latest technologies available in the market today. Each and every product is formulated to exact specifications and exceeds market standards for treat rate concentrations and overall performance. Hi-Gear's fuel additives help maximize fuel efficiency, decrease hard starts, restore lost acceleration and decrease rough idling. Hi-Gear Complete Fuel System Cleaner is guaranteed to clean the entire fuel system (carburetor, fuel injectors, intake valves, ports, manifold and PCV valves) of varnish, gum, carbon and accumulated deposits in one application. Hi-Gear Complete Fuel System Cleaner reduces friction in the entire fuel system. It changes both free and entrained water into a burnable compound that maintains the combustion chamber firing temperature. Hi-Gear Complete Fuel System Cleaner maximizes power and performance and improves mileage by 5 to 6 percent. This product restores smooth idle, eliminates stalling, hard starting and excessive emissions. Hi-Gear Complete Fuel System Cleaner should be used prior to annual inspection. It will not harm catalytic converters or oxygen sensors and will not void the manufacturer's warranty. One bottle treats up to 20 gallons of gasoline.