Seems the resistor is only 5k ohms. At 20,000 volts that wont change things very much at all.. If it was 5 megohms that would probly make a difference. I will run the resistors awile and see what happens. I didnt notice the diff. until I was done changing them. The original plugs were platinum these are identical except they are resistor type. The old plugs looked like new and probly wouldnt have needed replacement at 60K miles but I noticed the gap on the old plugs was about .040 instead of the .031 called for. Is it possible the gap widened that much by itself?