What does the big maintenance car maintain?

Including changing oil, filter element, cleaning throttle and checking carbon deposit in spark plug.

1, oil change: oil change ensures good engine lubrication, reduces wear and prolongs service life.

2. Oil filter element: replace the oil filter element, filter impurities and metal particles in the oil, and keep the cleanliness of the oil.

3. Clean the throttle valve: clean the throttle valve to ensure that air can enter the engine smoothly and improve the combustion efficiency.

4. Check the carbon deposit on the spark plug: check whether there is carbon deposit on the spark plug and clean or replace it in time to ensure the normal ignition and operation of the engine. Major maintenance is mainly to ensure driving safety and increase driving life, which is basically a comprehensive inspection of the car. Major maintenance and minor maintenance are carried out in turn. Generally, a minor maintenance is carried out every 5,000 kilometers, and a major maintenance is carried out every 20,000 kilometers or 40,000 kilometers.