Perhaps these other guys have seen your truck but there isn't much to go on here for the rest of us.
Is it a Hemi? 2002 (3rd gen) 1500's still had 5.9 engines in them. The Oil you speak of could be a blown plenum on a magnum.
I would think a 2003 with a hemi could be rigged for a catch can. There are now "universal" catch can kits on the aftermarket.
On a magnum you won't see any smoke...some motors ping and some don't.
That's awful expensive oil for such short change intervals too. I run regular old Castrol 10-30 with a squirt of hyperlube (summer) and have done so for almost the last 70k+ miles.