SHOP PRO Complete Fuel System Cleaner reduces friction in upper cylinders, maximizing fuel economy. Outstanding performance to clean combustion chamber, cylinder heads, fuel injectors and intake valves. Treats up to 21 gallons. Contains no alcohol. Will not harm oxygen sensors or catalytic converters. High Mileage Vehicles Maximizes Fuel Economy Cleans Combustion Chamber Will Not Harm Oxygen Sensors or catalytic converters.
