Changing Spark Plugs
The service manual says to change the spark plugs in the E9X M3 every 37,000 miles. This seems overly excessive, especially in this day and age of modern engines. Most cars require spark plug changes after 100,000 miles. I know the 4.0 liter V8 is a high strung engine, but is it really necessary to change the plugs so often? Any advice would be appreciated.