The auto manufacturers claim that the sparkplugs don’t need to be changed for 100,000 miles, and for the most part, assuming that there haven't been any complications, the spark plugs can last that long.
However, we recommend that you have the sparkplugs changed every 60,000 miles. If you wait until 100,000 miles and the spark plugs are removed its not uncommon to cause some degree of damage to the cylinder heads. This is only a possibility and our crew works to avoid this at all costs.
When this damage happens to just 1 cylinder it will cost you more than what it would for a set of plugs to be replaced. When this damage happens to 2 or more cylinders, the costs start to get extremely expensive fast.
Have your sparkplugs changed before 100,000 miles roll over.