Penrite Petrol Total System Cleaner Additive is a professional strength, petrol fuel additive that effectively cleans the entire fuel system from fuel tank to engine. It uses a powerful and proven additive technology that cleans stubborn deposits and inhibits new contaminant build ups forming. It is safe for use with catalytic converters and oxygen sensors. It can be used in multi-point, direct and throttle body injected systems as well as carburettor fed induction systems. It can be used with both naturally aspirated or forced induction engines.