Eco Logic Advanced Petrol System Claner helps to effectively clean all petrol fuel systems and improves fuel economy and engine performance, as a result exhaust emissions are reduced. Features One Simple Application. Will not harm Oxygen Sensors or Catalytic Convertors. NonCorrosive, NonFoaming. Proven effectiveness and safe technology. Facts The longer the engine runs on normal quality fuel, i.e. without special treatment, the greater the reduction in Injector efficiency. After Service Benefits Reduces harmful exhaust emissions. Improves fuel economy. Improves engine performance. Cleans injectors and combustion chamber.