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kuyi84 -> spark plug wear.. (7/6/2006 3:16:08 AM)
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I have a situation with my spark plugs: I've been using the NGK iridiums for the past few oil changes (7k-9k miles), and already the plugs seem to be getting carbon build-up... They have a brown coating on them, though the ground and center electrode seem to have no other signs of wear. My question is: should this be occuring already?? Would this affect gas mileage? -My gas mileage has been poorer than normal as well. Any info would be great.. Thanks
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