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Hi, someone recommended iridium spark plugs for my 1999 LX Civic. Supossedly they give good spark and at high rpm they perform very well, much better than regular or platinum. How truth could this be? Will I get better mileage and any other improvement. What about life span, would they last more than regular plugs? I already ordered a set and hope that they are at least as good as the regular ones?
Thanks
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