Porsche Liqui Moly Valve Clean is an ash-free, self-mixing combination of active agents, formulated according to the latest additive and fuel technologies. Specifically developed for port injection fuel systems. Effect:
breaks down deposits on valves and in the combustion chamber 
removes and dissolves residues throughout the fuel system
protects against corrosion throughout the fuel system
environmentally friendly and economical
prevents carburetor icing
proven performance with catalytic converters and turbochargers