[B10alia]

+1 on keeping on the oil change. I go with 6k on synthetic with just a filter change and top-up at 3k. Overkill, yes, but I still have factory crosshatch on an 18-year-old motor. Changing the oil frequently is good advice for any motor, and where the 2.7 has some sludging issues, it's even better advice. For its displacement, the 2.7 was a very powerful motor, and if you take care of it, it will last you a long time.
EDIT: MAKE SURE ONLY ATF+4 is used in the transmission! Dex/Merc with additives is NOT ACCEPTABLE, and you will ruin your transmission by using the wrong fluid.