How Long Can the Original Spark Plugs Be Used?
2 Answers
The original spark plugs can be used for 20,000 to 40,000 kilometers. The functions of spark plugs are: 1. To introduce the high voltage generated by the ignition coil into the engine cylinder; 2. To generate sparks between the spark plug electrodes to ignite the air-fuel mixture, ensuring the engine operates normally. The method for removing spark plugs: 1. Clean the dust and impurities around the spark plugs using compressed air or a soft tube to blow them away; 2. Ensure the engine is in a cold state before proceeding; 3. Protect the spark plug hole immediately after removal to prevent impurities or dust from entering the cylinder; 4. Avoid damaging the insulating ceramic body when using a wrench; 5. Do not bend or strike the center electrode when adjusting the spark plug gap.
From my years of experience in auto repair, I've observed significant variations in the lifespan of original spark plugs, depending on materials and driving habits. Copper plugs typically need replacement between 16,000 to 30,000 kilometers, with urban short-distance driving accelerating wear. Premium platinum or iridium plugs can reliably last 60,000 to 100,000 kilometers. I've seen many car owners neglect replacement beyond 40,000 kilometers, resulting in engine misfires, skyrocketing fuel consumption, and costly repairs. While spark plug replacement seems minor, prolonged delay may cause chain failures in ignition coils - the consequences outweigh the savings. Follow your maintenance manual's recommendation, with average inspections every 30,000 kilometers (can extend slightly for highway-heavy driving). For safety, address it proactively rather than waiting for symptoms - early replacement brings peace of mind.
