October 10, 201214 yr #21 Octane booster stains iridium plugs. The plug can't burn it off again. It causes misfires and blow outs. Steer clear. I've had same happen to me.Anyone know if injector cleaner does the same to iridium plugs?Yes mate...Before octane boosterAfter approx 20 1/4 mile passes and 500km later... re-gapped to 1.1mm in an N/A though' Edited October 10, 201214 yr by XR6menace
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