Civic EG

so i changed spark plugs recently and there was oil on some of the old ones i pulled. just wondering what this means

could mean a couple things either a leaky valve seat, leaky spark plug tube, deteriorating rings or best case scenario your valve cover seal needs replaceing which tends to happen due to the rubber deteriorateing

oOo.. that all sounds LAME! haha.. i'll probably end up taking it to the shop after i replace pcv valve haha.. like that's gonna help eh. thanks a lot