Highly effective cleaning and preserving combination of additives that can be universally applied in all gasoline and diesel injection systems such as K, KE, L Jetronic or all aspirated and high-pressure injection diesel systems (pumped-jet, common rail). With Fuel System Cleaner / Conditioner a number of problems that result from troublesome deposits in the mixture preparation or combustion chamber such as poor starting behavior, irregular idling, poor throttle response, high fuel consumption, high exhaust emissions values, etc. can be rectified.