Posts Tagged: Spark plug life

Spark plug life

Spark plug life — when to change spark plugs? Spark plug life and change intervals depend 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 naturally aspirated port-injected engine with a coil-over-plug ignition system can sometimes last up to 120,000 miles. But those same iridium spark plugs in some lean-burn turbo engines with direct injection may last only 30,000 miles. What determines spark plug life? Spark plug electrode … Read More