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Old 07-24-2008, 10:42 PM   #4 (permalink)
Daox
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Join Date: Dec 2007
Location: Germantown, WI
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CM400E - '81 Honda CM400E
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Swarthy - '14 Mitsubishi Mirage DE
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I'd agree with Lazarus. Platinum and Iridium plugs are mainly there because they last longer, not because of higher performance. IMO check your plugs more often and stay with the cheaper copper.
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