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David David is offline
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Join Date: Apr 2002
Location: Houston (Clearlake), TX
Posts: 8,688
I change plugs way too often .

The W3DPO's are like a 9 heat range NGK so they're very cold. That's probably why they're so dark. A Bosch W8CS is like an 8 heat range NGK.
2014 Cayman S
2011 Cayenne Turbo
1979 930 (475 rwhp at 0.95 bar)
Old 05-02-2007, 11:49 AM
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