Tip - How to Replace Spark Plugs in a Saturn Ion | eHow

The Saturn automobile company suggests that the spark plugs in an Ion be replaced every 60,000 to 100,000 miles. Inspect Saturn Ion spark plugs for wear and corrosion every 30,000 to 35,000 miles to retain fuel efficiency. An Ion that is sluggish or not getting good gas mileage probably needs new spark plugs.