How many kilometers does a car spark plug need to be replaced?

[SanGabriela]

Car spark plugs need to be replaced every 20,000 kilometers. The function of the spark plug is to introduce the pulsed high voltage generated by the ignition coil into the combustion chamber, using the electric spark generated by the electrodes to ignite the air-fuel mixture, completing the combustion process. The gap between the spark plug electrodes greatly affects the performance of the spark plug. If the gap is too small, the spark will be weak, making it prone to carbon buildup and leakage. If the gap is too large, the required breakdown voltage increases, making the engine harder to start and more likely to misfire at high speeds. Spark plugs are commonly known as sparking plugs, and the main types include standard spark plugs, extended insulator spark plugs, electrode spark plugs, seat spark plugs, pole spark plugs, and surface gap spark plugs.