oil in spark plug reservoir on 2003 Nissan 350Z

When I changed my spark plugs I had oil in the plug holes. Will changing the valve cover gaskets fix this? Could this damage the coils?

2 answers
Hi,
Did you find out where the oil leak was coming from? Was it the valve cover gasket?
Thanks!
i have the same problem oil in the valve cover tubes how do you fix this a new valve cover is 275.00 this is crazy I have a 2004 touring con