Thread: The best spark plug
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Old 08-14-2012, 01:39 PM   #2 (permalink)
gone-ot
...beats walking...
 
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...if you have FUEL ECONOMY in mind, a set of OEM iridium plugs gapped slightly wider than spec is preferred; but, if you're after POWER, a fresh set of "colder" copper-core plugs, gapped somewhat narrower than spec, is better.
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