Red Line’s SI-1 Fuel System Cleaner is a concentrated package of the most powerful high-temperature detergents available. Together, these detergents clean gasoline fuel injectors, carburetors, intake valves, and combustion chambers–and can clean injectors to nearly 100% efficiency in one treatment. The cleansing effect on injector deposits can raise fuel economy approximately 12% or even greater, depending on the condition of the injectors. SI-1 also contains detergents and a synthetic upper cylinder lubricant which will help clean pollution control valves and can reduce octane requirements by two numbers. SI-1 treats up to 100 gallons, protects the fuel system from rust, and is safe for continual use on all gasoline vehicles.