Liqui Moly Valve Cleaner removes deposits from valves and combustion chambers, preventing new buildup and optimizing engine performance. It improves compression, saves fuel, reduces emissions, and supports cleaner engines for better emission test results. Suitable for all gasoline engines including carburetors and manifold fuel injection, one 150 ml bottle treats up to 75 liters of fuel and is added directly to the fuel tank during refueling. Tested safe for turbochargers and catalytic converters.