DDom wrote:
if ANY of you with major oil leaks occurred in below freezing temps AND you have a EHM or something similar which directs oil outside of the relative warmth of the engine compartment you NEED to check for obstructions in your CCV hoses! Primarily ICE. Water vapor is present at the CCV and will freeze solid if not drained properly when hoses are routed.
Pardon me for rambling if this has no significance to you.

I originally started this thread and failed to follow up. I apologize for that. The advice you give is warranted. I installed a Saiko catch can using reinforced vinyl hose from Lowes...took the recommendation of others to use something sturdy and clear for monitoring. It did have a small kink in it that I thought would work out over time. This didn't seem to impede the flow of vapors, but I decided to place a plastic elbow at the location of the kink to ensure it wouldn't be a problem.
Upon putting that elbow there, I then developed a major oil leak, that would coat a trailer like the picture above. The entire underside of the Jeep was covered. I had the Jeep scheduled for a balljoint replacement with a local mechanic and asked him for assistance to traciing the leak. It turns out that the molded plastic elbow (intended for use with heater hoses, good temperature resistance, right?) had some flashing in it and wasn't open. So, the engine would build pressure and blow the oil out of somewhere. I haven't quite figured out where. The mechanic had the engine running and pulled the oil dipstick only to have oil start spraying out.
I don't know about you JL Rockies, but all of my oil was gathering on the engine skidplate. The thing was plum full. I'm not exactly sure of where the oil is coming from on the engine. I did have a little on the front of the engine from it being slung by the accessories. There was very little on the sides of the engine. All of it is from the skidplate and to the rear of the engine. From what I've read in the full service manual, the engine seems to have some sort of pop-off valve. I've tried figuring out where this would be based on the parts manual. I have trouble translating what I see in the schematics to the actual 3-D object. With the accessories on the engine, I was never able to see a port from which all of the oil would be spraying from. I'm assuming this valve is to guard against overfilling the engine with oil and it might prevent blowing crank seals. From what it can tell this pressure relief valve, looks like it's somewhere in the front passenger side area of the oil pan, but it's not obvious in the picture where this thing exits the engine. Based on the picture, it doesn't seem like it does, but having a pressure relief that stays within the engine doesn't necessarily make sense.
I did top the oil level off. Seeing how I was terrified to drive it, I didn't start the engine for a few days. The oil level would actually go from being on the upper full line to about a quarter inch below the add line. There have been others who have had "obstructions" in the crank case ventilation before and didn't report the oil loss I saw or you saw.
So...looking for an obstruction in the ventilation system is a good call...and probably the cheapest fix you'll find. Good luck.