How Often Should Spark Plugs Be Replaced in a New Car?

[LaJordan]

New cars typically require spark plug replacement every 30,000 to 40,000 kilometers. The function of spark plugs is to generate sparks through the discharge phenomenon between electrodes, using forced ignition to ignite the air-fuel mixture. Since gasoline engines rely on the timely combustion of fuel and air mixture to generate power, gasoline as fuel is difficult to self-ignite even under high temperatures. Therefore, it's necessary to use sparks for proper ignition. When replacing spark plugs, it's crucial to do so when the engine is cold. This is because spark plugs expand when hot, making the bolts and threads tightly bound together. Replacing them while hot can easily cause thread stripping or breakage. Replacing spark plugs when the engine is cold is much easier and reduces the risk of thread damage.