RZ21G 5-in-1 Fuel System Cleaner, 300 mL

RZ21G 5-in-1 Fuel System Cleaner is a premium synthetic additive engineered to deep-clean gasoline direct injection (GDI) engines. It effectively removes varnish, gum, and stubborn carbon deposits from fuel injectors, intake valves, spark plugs, and combustion chambers—preventing future buildup. Formulated to meet stringent European standards, it delivers superior wear protection, rust and corrosion inhibition, and valve train lubrication. This restores lost horsepower, improves throttle response, enhances fuel economy by up to 5%, and significantly reduces harmful emissions. Compatible with all unleaded gasoline grades, including E10 and E15. Simply add one 300 mL bottle to a 60-liter fuel tank before refueling for optimal results. Recommended for modern high-performance gasoline engines requiring OEM-spec maintenance.