Removes deposits on injectors and in the combustion chamber. Increases cetane number. Eliminates engine malfunctions (e.g. knocking on the throttle) and ensures quiet and smooth engine operation. Protects the entire fuel system from corrosion. Optimizes exhaust gas test values. Can also be used as a preventive measure. Clean engines consume less fuel and are less polluting.

Beneficial properties of Liqui Moly fuel additives see here