Well after pulling my upper intake off I noticed a bunch of oil caked on the walls to the port for the #3 cylinder. Then I pulled the lower off and the oil all the way through the port inside the cylinder head.(only on # 3) How is the oil getting in there? I checked the lower intake gasket and that wasn't the source. The only possibilities I could think of would be #1-piston ring, #2 headgasket, #3 valve seal. I'm only finding this oil on the 3rd cylinder, theres not even a small bit on any of the other cylinders. Any input on whats going on is greatly appreciated.