If it's not leaking oil, then it's OUT of oil! Actually with some of the newer mods and newer gaskets and hi-tech sealers, we didn't have to hang the old coffee can below the engine to catch the drips. The trips from So. FL to Colorado required at least four fuel stops, since from engine start to dry tanks was a flat three hours. There was actually one guy who filed an IFR for a trip of 3hrs and 20 minutes in a T-28. It disappeared from radar about 3:05 into the trip with the expected outcome. You now need a type rating to fly these...