oil on spark plugs?

[supraturbo510]

was changing my plugs yesturday and noticed that on 5 and 6 there was oil dripping from the spark plugs when i removed them..whats the cause for this? thanks

 

[gp-7mgte]

probably valve cover gaskets

 

[theDon]

this was just discussed, search is your friend:

http://www.supramania.com/forums/showthread.php?t=13957