Hey there, i bought a car that has been in someones family for 15 years, 86 vette, it has 96k miles on it, and it would sit for months sometimes year at a time, anyways i pulled the old spark plugs out and noticed black deposits on the ends of the plugs and oil around the threads in the block. It had leaking valve covers on both sides, both were realllly shot, all 8 plugs had the black oily looking liquid on the threads. anyways i changed them out, forgot to clean the oil from the cavities and put the new plugs in, ran it for about 15 minutes yesterday and it sounded fine other than some rocker noise and the hole in the egr tube. decided to pull a plug out today to see what they look like, it had oil on the threads (because i forgot to clean the cavities out) but no oil on the electrode or anything like that... i am hoping the rings aren't screwed or the valve guide seals. what should i do to check for these problems? can a car sitting for long periods of time eventually get oil on the spark plugs? did not notice any blue smoke when it was running. what should the oil pressure read on the dash gauge? keep in mind that both Valve cover gaskets were shot, and there is oil and sludge on both sides of the block around the plugs. I just could not imagine the oil climbing up the threads?