Have you been using any kind of octane booster? I thought I remember those usually causing a lot of red oxide. I could be wrong thoughYep, thats what they were! They don't show any sign of lean out...which is good. The amount of red oxide on em from only 10k leads me to believe they are a tad warm for the amount of boost I'm getting. Think the NGK 6510s are a good call at this point!
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