How many kilometers does a vehicle need to run before replacing the spark plugs?
2 Answers
Vehicle mileage varies depending on the material of the spark plugs: 1. Nickel spark plugs need to be replaced approximately every 30,000 kilometers; 2. Platinum spark plugs require replacement every 40,000 to 50,000 kilometers; 3. Iridium spark plugs, which are more wear-resistant, should be replaced approximately every 100,000 kilometers. If the car engine experiences significant shaking during idle operation, it may also indicate a problem with the spark plugs, and they should be inspected or replaced promptly. Alternatively, it could be due to aging engine mounts or excessive carbon buildup in the cylinder intake. It is recommended to have a professional repair shop conduct an inspection.
Having driven for over twenty years, I've found that the replacement interval for spark plugs really depends on the vehicle model. Veteran drivers often say replacing them every 40,000 to 50,000 kilometers is a safe bet, but nowadays many new car manuals recommend inspection and replacement at 60,000 to 80,000 kilometers. Last time when my Japanese car reached 70,000 kilometers, the fuel consumption suddenly increased. When the mechanic opened it up, the spark plug electrodes were completely worn out. Actual replacement intervals should also consider driving habits – vehicles frequently stuck in traffic or driven aggressively will wear out faster. Always use the manufacturer-recommended spark plug model, as using cheap off-brand plugs might damage the engine. During maintenance, have the mechanic check one or two spark plugs – white color indicates too lean fuel mixture, while black means excessive carbon buildup, which is more reliable than simply going by mileage.
