Originally Posted By: demarpaint
A long road trip is the best thing for an engine, use your favorite oil in the recommended grade and enjoy the trip.
+1. Some of the best UOAs Ive seen in the past on the 4.3 have been running Pennzoil, including PYB.
PYB with LC20 would be my pick. Alternately Maxlife with LC20.
Typically I would have recommended the AC Ultraguard Gold PF52, but I have a Fram super ultra shrinkwrapped special (forget the actual real name), and Ive been happy. Its the only non-delco filter (PF52 or UPF52) that doesnt caue a startup tick for 5-10 seconds at cold temperatures...