If I were you just replace it every 12K or 1yr which ever occurs 1st
January, 20, 2012 AT 11:23 PM
Platumium plugs is 100k copper plugs 30k. When u change the plugs is when u cant clean and regap them because the center ingiter has worn to the porclen then the platumium plug will need to be replaced. Copper ones u change every tune up and are much cheaper.