Liqui Moly Cleaner Compo (2 products for adding directly to the fuel tank together) The FIRST product to Removes deposits on injection valves, intake valves, spark plugs and in the combustion chamber and prevents new deposits from forming. Eliminates starting problems and rough engine running. Maintains all components of the gasoline injection system. Protects the entire fuel system against corrosion. Improves throttle response and compression. Optimizes the emission test values and the performance of the engine. Clean engines use less fuel and reduce the pollutant emissions. The SECOND product to Protects the catalytic converter from clogging with soot. Cleans the injection system and the combustion chamber. The combustion improver works directly, which leads to an immediate, measurable reduction of the pollutants. Clean engines use less fuel and emit less CO2. Prevents corrosion in the fuel system. Tested for use with turbochargers and catalytic converters.