I took around a quarter of a roll of paper towels to soak it up and get it out of there. I was advised that under no circumstances should you let the oil drain into the combustion chamber. I would assume it would foul your O2 sensors and other things along the exhaust. Unless you were completely rebuilding it I'd clean it up as best you can and do what I did, I bought the valve cover gasket set from rock auto, intake gaskets, and I replaced them both at the same time. My intake gaskets werent' going to work a second time so I had to personally. But it's all worth the hastle, all the leaks I have are old stuff burning off and melting away, no a single pool of oil yet, only what I couldn't get up with the towels at the time, car runs great, I just wiped the plugs off really well and cleaned the boots carefully, runs like a champ.