Quote:
Originally Posted by Ximian
How often is everyone replacing spark plugs? I think I'll be going down to a 10-15k mile interval. The old plugs which have maybe 25k miles on them don't look fouled or damaged, but the engine is so much smoother now.
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I see no reason to stray from the OEM interval of 37k which is already hilariously short for a platinum plug.
Stop relying on the butt dyno. If you want objective information, look for misfires in the ECU and pull the plugs to check the gap. Replacing parts arbitrarily is throwing money down the drain.