Mannol 9202 Catalytic Ester Petroleum Fuel Additive 450 ml is a premium engine cleaner crafted in Germany to restore fuel system and exhaust performance in petrol and hybrid vehicles. This synthetic ester based complex detergent and lubricant cleans injectors, intake valves, spark plugs and catalytic converter cells without the need for dismantling. It optimizes combustion efficiency, enhances catalytic converter lifespan, improves oxygen sensor sensitivity and lowers carbon monoxide emissions. The advanced formula combats soot, varnish and resin build up while forming a protective oil film that prevents future buildup. Suitable for all petrol engines including two stroke and hybrid models. Add one bottle to 30 L of fuel for deep cleaning or one per 45 L for maintenance. Ideal for city driving this additive delivers smoother engine operation improved acceleration and reduced fuel consumption.