Red Lines Fuel Injector Cleaner is a concentrated package of the most powerful high-temperature detergents available to clean gasoline fuel injectors and intake valves. It can clean injectors to nearly 100 percent efficiency in one treatment. The cleansing effect of these detergents can raise fuel economy approximately 12 percent or more, depending on the condition of the injectors. Red Line Fuel Injector Cleaner also contains a synthetic upper cylinder lubricant, which will help clean and lubricate intake valves, pollution control valves, combustion chambers and carburetors, as well as protecting the fuel system from rust.