The 92-97 3.2L doesn't have the oil burning issues that the 98+ motors did. For example, in 2008 my Trooper went to Moab and back (almost 3000 miles), with a week of wheeling in the middle, and burned about 1/4 of a quart (motor has about 125K miles on it).

OTOH, the newer motors make more power than the 175-190hp of the older generation 3.2Ls.