This guys 93 Accord broke down in front of my house , so I helped him push it to the side of the road and proceeded to check out the problem . It would crank but wouldn’t turn over , it was getting fuel( I checked ). So I pulled the Spark plug wire and noticed there was oil on the end of the tube , so i looked down in the cylinder for the plug and there was about a 1/2 " of oil down there . Thats why he wasn’t getting any spark , but my question is how would that get down there ( oil was in #1 & #4 wire , I didn’t check 2 & 3 ) ? I was thinking broken gaskets that go around the spark plug when you put the valve cover on 
Probably the spark plug grommets. a few bucks a piece. may as well change the valve cover gasket at the same time