STP Multipurpose Motor Treatment: * Stabilizes fuel * Fights rust build up in fuel tank * Prevents oxidative degradation in fuel * Fights tough cold starts * Prevents corrosion in the fuel line * Cleans engine deposits and fights friction * Cleans fuel injectors and intake valves * Protect against viscosity build up * Protects against crankcase sludge * Prevents fuel line freeze by removing water * Provides upper cylinder lubrication * Use regularly to protect and maintain all of your gas and diesel engines