Just got done with new motorcraft copper cores, gapped at .028 new cap and new rotor. Cap and platinum bosches only had about 25K on them…plugs looked like they had 100K. Cap was carbon tracked enough to go ahead and do it, rotor was on the car at 132K when I got it. Wires were new about 6K ago…MAN! NEVER EVER use those platipus plugs again! What a difference. Car starts right up.