If you are speaking of a 4 foot tube, it is stuck in the "tombstone" not the ballast and you should be able to rotate the tube by turning from both ends. If this is a compact fluorscent, it may be stuck in a ballast that is then screwed into the socket.
Breaking the compact fluorescent lamp to use the old potato trick is not a good idea. Just throw them both away.
As to the oil idea - no.