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Old 05-03-2010, 09:15 AM
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hydrex hydrex is offline
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Join Date: Sep 2009
Location: Penobscot, Maine
Age: 63
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Vehicle: 2005 QC 4X4 HEMI RAM
Trim Level: Thunder Road
Color: Mineral Grey
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
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The only advantage of copper plugs is if you run nitrous. They are less prone to fouling if you hit them with a rich mixture. Other than that, go for the platinums. Part of the problem that's causing bad mileage, ethanol in the gas. My hemi used to get 18 mpg if you drove easy, now 16.5 is about it. Pay more, get less. Government helping us out some more.
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