Clean your fuel system with Red Line SI-1 Complete Fuel System Cleaner. Cleans injectors, carburetors, valve and combustion chamber deposits with a concentrated blend of the most powerful high-temp and low-temp detergents available. Cleans to nearly 100% efficiency in one treatment. Reduces need for octane by up to two points. Contains synthetic upper cylinder lubricant. Cleans pollution control valves. Use one bottle per tank for most effective treatment of neglected vehicles. Also use in smaller doses for maintenance as one bottle treats up to 100 gallons. Suitable for use with oxygenated fuel. Safe for continual use. Same chemistry is also available in 4oz dosage as Complete Fuel System Cleaner for Motorcycles.