I don't see much white residue showing detonation but I do see quite a bit of redness. Is that copper residue then? Can anyone tell me if I'm running rich, lean or other problems in my engine? The spark plugs were pulled when I got my timing belt swapped out at around 98K miles. I think the plugs had about 30k miles on them. Good ol' NGK V-Power copper spark plugs.
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