In general, the life of a resistive spark plug is 20,000 kilometers, the life of a platinum spark plug is 40,000 kilometers, and the life of a sheet metal spark plug can reach 60,000 to 80,000 kilometers. If you find that the fuel consumption of the vehicle increases, you can consider whether to change the spark plug. Generally, the repair shop will recommend replacing it two or three thousand kilometers, because the spark plug is not completely damaged, but the performance is reduced.
The service life of automotive spark plugs varies according to the material of the spark plugs. It is not uniform. The common electrode materials on the market are copper, nickel alloy, platinum and sheet metal.