First time posting on this forum. Was looking for some help with a problem on my Ford Jubilee. I have been disking a field to get ready for a fall planting here in NY but the Jubilee is using close to a quart of oil per hour. It seems like most of the oil is being lost through the seals and not burnt. Leaking mostly from the rear main seal and oil pan seal. It only leaks while running which makes me believe I have positive crankcase pressure. So far I have cleaned the crankcase breather and replaced the filter on the air exhaust port located on right rear side of engine valve cover. When engine is running i feel air being expelled from this exhaust port so it doesn't seem to be restricted there. I suspect maybe that the piston rings could be stuck or worn. I currently have the cylinder soaking in marvel mystery oil to free them up. If that doesn't work I am not sure where to look next short of tearing into the engine. Any ideas would be greatly appreciated.