Sooo... Been burning a LOT of oil in my '92 7.3 IDI (non-turbo). I'm going through a gallon of oil every 250-300 miles, sometimes more. But it's not really smoking blue at all, and it isn't leaking more than a drop or two. Truck starts and runs decent. I've got to figure this out because it's my daily driver and I put a LOT of miles on it. The oil consumption is driving me nuts! Any ideas?? I've seen some mentions of the CDR valve being a possible culprit, but could it really cause it to use this much oil?