10K Boost Hybrid Protect & Clean is especially developed for all latest hybrid vehicles with a petrol engine. Hybrid vehicles have a considerably lower fuel consumption and in some cases even drive electric only. In hybrid vehicles the petrol engine frequently operates when cold (with cold starts), starts and stops frequently and the fuel remains in the tank for a relatively long time. This results in incomplete or suboptimal combustion leading to deposits in the intake and combustion system as well as on injectors. Due to the frequent start-stops, engine lubrication is reduced leading to increased wear and tear in the engine. Furthermore, the fuel in the tank deteriorates over time adding to the (internal) polluting effect.