How many kilometers does it take to clean up the carbon deposit?

The carbon deposit on the Tiguan car is cleaned once every two years: 1. The black colloid produced by insufficient combustion of engine oil in the cylinder, such as the material residue in the nozzle, throttle, oil pipe, spark plug, cylinder head and inner wall, is repeatedly subjected to the high temperature of the engine, which is called carbon deposition; 2. Harm of carbon deposit to automobile engine If carbon deposit is not cleaned for a long time, it will lead to the decrease of automobile engine power, increase of fuel consumption, abnormal engine noise and unstable idle speed. 3. If it is a new car, if the engine power is insufficient and the fuel consumption is high, then it is recommended to clean the throttle or make a car endoscope to see if it is carbon-deposited; 4. If it is an old car, it has run more than 654.38+ 10,000 kilometers, you can choose a cleaning agent to clean it, or you can take it apart for cleaning.