General Maintenance & Repairs - Reason for Oil in threads of Spark Plugs

Outside of a valve cover gasket leak, any insight why oil would be in the threads and on the body closest to the plug wires, on spark plugs?

ttt i need answers too . . my number seven has oil on the threads not a lot but it has sum . . ::worried::

Would this be due to the top ring (compression ring?) not sealing and allowing oil in the combustion chamber and onto the plug? I thought the rings don't seal really well until the engine is warmed up anyway - if that's the case, would it be normal to see some oil?

I think I misread....you're talking about the outside of the plug - in that case, I'm not sure.

I usually apply a small amount of oil to the treads of my plugs to make them easier when its time for a plug swap. I think on my next change I won't use any oil to see if I'm having the same issue as you are.