Keep in mind for the spark to jump the gap of the plug, the center electrode or the wire HAS TO loose a tiny bit of itself. Microscopic yes but it adds up over millions of cycles. This process is easiest for the ignition system when ther are sharp edges on the electrode or wire, heck we used tonfile them or cut the end of the wire off with snips... I suppose its all relative tho, did you know that a top fuel dragster completly 'uses up' its plugs before the motor even turns over 1000 revolutions!!??
