What are the effects of not replacing spark plugs on a car?

[PeterLynn]

Not replacing spark plugs can affect the car's fuel consumption, the three-way catalytic converter, and the car's starting performance. Long-term failure to replace them can easily lead to spark plug damage. Spark plug replacement cycle: Under normal maintenance conditions, spark plugs should be replaced after driving 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine, so it is recommended to follow the user manual. You can refer to the following standards for maintenance replacement: platinum spark plugs should be replaced at 40,000 kilometers, ordinary nickel alloy spark plugs at 20,000 kilometers, and iridium spark plugs at 60,000 to 80,000 kilometers. What are the effects of damaged spark plugs: If the spark plugs are damaged, it can directly cause issues such as leakage in the vehicle's ignition system, increased fuel consumption, and reduced power. The most significant problem is difficulty in ignition, which affects the normal use of the vehicle. Severe spark plug erosion, such as scarring at the top, damage, or melted and eroded electrodes, indicates that the spark plugs are damaged and should be replaced.