Why Replace Spark Plugs?
3 Answers
Reasons for replacing spark plugs: Spark plugs have a service life and can accumulate carbon deposits over prolonged use. If not replaced regularly, the engine may experience difficulties starting, insufficient power, increased fuel consumption, and excessive exhaust emissions. If a spark plug fails, the car cannot operate normally and requires immediate replacement. The replacement interval for spark plugs typically ranges between 20,000 to 100,000 kilometers, varying based on the material. Ordinary nickel-alloy spark plugs should be replaced every 20,000 to 30,000 kilometers, while platinum spark plugs can last 60,000 to 80,000 kilometers before replacement. If abnormal engine vibrations occur during acceleration, it is likely due to degraded spark plug performance. Deteriorating spark plugs significantly reduce the engine's ignition efficiency, leading to sluggish acceleration.
I've been driving for decades, and changing spark plugs is a routine task. If you don't replace them, the car struggles to start, the steering wheel shakes like an earthquake at idle, and acceleration feels sluggish with a frighteningly fast drop in fuel gauge. Worn-out spark plugs cause inefficient ignition, forcing the engine to work harder—burning more fuel and risking damage to the catalytic converter, which leads to higher repair costs. Replace them every 20,000–30,000 km or as per the manual to keep the engine smooth and worry-free, extending the car's lifespan and avoiding costly roadside breakdowns. During routine checks, monitor spark plug gap wear and address issues promptly for reliability.
Regularly changing spark plugs is practical for saving money and hassle. Ignoring it can lead to a 10-20% increase in fuel consumption, reducing your range by dozens of kilometers per tank. Poor ignition can overload other components, making repairs more expensive and troublesome. Keeping fresh spark plugs ensures smooth engine starts, quicker power response, and even reduces emissions to protect the environment. Generally, they should be replaced every few tens of thousands of kilometers—specifics depend on driving habits or consulting a reliable mechanic—to prevent minor issues from turning into major repairs. Through regular car maintenance, I’ve found that timely replacement actually saves long-term costs, extending the vehicle’s lifespan and value.
