Cleans deposits on injectors, carburetors, valves and combustion chambers with a concentrated blend of the most powerful high- and low-temperature detergents available. Cleans all types of fuel injectors, including GDI. Improves fuel stability; reduces the formation of gums and varnishes Use one bottle per tank for the most effective treatment; Cleans with nearly 100% efficiency in a single treatment. Reduces octane requirement by up to two notches. Contains synthetic upper cylinder lubricant. Cleans contamination control valves. Suitable for use with oxygenated fuel. Safe for continuous use The same chemistry is also available in 4oz doses as a Complete Fuel System Cleaner - Powersports