Spark plugs should be changed every 10 to 20 thousand miles. It seems like it might be complicated to do this type of maintenance, but it is very easy, if you follow some basic tips.
1. The Right Plug
The most important thing with spark plugs is to make sure you have purchased the correct model for your vehicle. A short conversation with a mechanic or a worker at an auto parts store will help you determine the right model of spark plug for your car.