Posts Tagged: when to replace spark plugs

When to change spark plugs

When to change spark plugs It isn’t every 100K miles That’s right smarty-pants, not all spark plugs last 100K miles. This myth got started back in the 1990’s when carmakers switched to platinum tipped spark plugs. Those plugs were rated at 100K miles. But those 1990’s engines ran at lower combustion pressure and temperatures. The fuel systems ran at much lower pressures and the ignition systems fired and lower voltages than late model engines. You don’t see single ignition coils or DIS ignition on late model cars. They’re all coil-on-plug. … Read More