After reading this post, I decided to check one of my plugs to see how they were holding up after 85k miles. The plug looked OK, but I regapped it back to spec (.050 inches). I measured the gap on 5 of my 6 plugs. It varied from .062 to .068. All 6 plugs looked pretty good except for the gap. It seems to run a little better now. I'll watch the EVIC and see if my average mpg goes up any (22.3 now). I do about 50 % highway driving and I do NOT have a lead foot. I'll probably change the plugs at the 105,000 mile interval as the manual suggests. I'll install the Champions, since they're half the cost of the NGK's and seem to be liked just as well. ($3 vs $7 at Advance Auto Parts yesterday)
More importantly, I will plan on re-gapping new plugs after they get 50,000 miles on them - so they don't get so far out of spec.
fyi - I have one of the wire gauge plug gappers and it has a bending tool built into it that makes it REAL easy to gap the plug without pushing down on the middle electrode.
Member # 2003 - 2000 Chrysler 300M (Build date: Feb 26, 2000)
2008 Hyundai Sonata Limited
2004 Honda Pilot EX, 2002 Toyota Camry XLE, 2000 Nissan Maxima
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