An oil leak from the oil filter adapter may be evident. Chrysler has made a revised oil filter adapter is available.Google+
Car Problem Reports
Chrysler Voyager Oil May Leak From Oil Filter Adapter
Chrysler Voyager Problem
Engine Affected: 3.3L V6
Visitor, 2002 Chrysler Voyager, 3.3L V6, 150,000 mi
My car has an oil cooler between the oil filter adapter and the filter. There is a big o-ring very similar to filter's one between the oil filter adapter and cooler. I replaced the cooler's o-ring with the old filter's o-ring when replaced oil. Got it much better but still seems to leak a little bit.