What are the effects of not changing spark plugs for a long time on a car?

[DiEloise]

Not changing spark plugs for a long time can directly cause various problems such as leakage in the vehicle's ignition system, vehicle shaking, increased fuel consumption, difficulty in acceleration, and reduced power. The most significant issue is difficulty in ignition, which affects the normal use of the vehicle. Typically, the service life of a spark plug is 15,000 kilometers, while long-life spark plugs can last up to 30,000 kilometers. The purpose of a spark plug is to ignite. During use, the electrodes of the spark plug consume electricity through spark discharge, especially when the center electrode reaches a higher temperature and is consumed by acidification. The amount of electrode consumption varies based on the melting point, strength, and hardness of the electrode material. To reduce this consumption, materials such as nickel alloy, platinum, or iridium are used in the electrodes, which can extend the lifespan even with very fine electrodes. Timely replacement of spark plugs ensures complete combustion of gasoline, thereby achieving optimal power and reducing fuel consumption.