Is there oil on the top of the plugs, or are the plugs getting fouled at the spark side?

I have the 3.2l and the entire divers side bank of plug had oil sitting on top of the plugs, but the spark side was clean and pretty. The valve cover gasket is leaking, doesn't cause a problem - other than leak oil. You can change the valve cover gaskets, if you'd like. I just left mine alone.

If the plugs are getting fouled on the spark side from oil, then i can't help you there.

-Robert