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Originally Posted by Stunin_Stud
I changed the sparkplugs not because it sits alot but because of age. also some people recomended at 30k although dealer says to do it at 30k. anyaywa im happy with it changed, the car is noticably smoother.
btw i got all the stuff and did it myself for about 200 bucks....porsche mechanic wanted 780 for the job and i didnt bother asking the dealer for how much they would do it for.
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What happens to spark plugs with age (as opposed to use)?