I ran 10-30 the first change and 10-40 since. The thing runs like a damn top, no issues what-so-ever other than having to check my oil frequently (which I do anyways). I was averaging about 17mpg before the roof rack, lights and spare tire up top and even with all that I'm at about 15mpg, I'd say at 140K miles she's doing pretty good other than being an oil whore. I don't have a catch can on it but have been thinking about installing one just to see as well, I actually think I have one around here somewhere. I agree it's freaking crazy, it's probably why the guy sold it so cheap I just buy 2 jugs of oil when it's time for a change. I carry the 2nd jug in with all my other "tools" in the spare tire area.
Your truck should have leakage or it just burns oil ? Do u note any spots on ground after parking?