Quote:
Originally Posted by timmyc
Swapped out plugs to the NGK Ruthenium. Not sure what to expect. Getting ready to hop on the highway and open it up. No noticeable improvement in idle.
This car is newish to me a (a year this month) and I don't drive it much. The pics I posted here are from just one cylinder. I haven't ever seen this before. Loose plug? Even the coil pack was saturated. It always ran fine with no CEL. Your thoughts? 
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I put Ruthenium plugs in my M54. No noticeable difference. No change in fuel mileage either.
You have a badly leaking valve cover gasket.