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Posts Tagged: Spark plug life

Spark plug life

Spark plug life — when to change spark plugs? Spark plug life depends on more than just the type of metals used in the electrodes. It also depends on the type of ignition system and engine design. For example, iridium spark plugs in a regular port-injected engine with a coil-over-plug ignition system can sometimes last up to 120,000 miles. But those same spark plugs in some turbo engines with direct injection may last only 30,000 miles. What determines spark plug life? Spark plug electrode material A spark always jumps from … Read More


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