I took the car to our local dealer (not where we bought it) and they happily changed the oil. I talked with the mechanic who did the work (great guy, BTW) and he said if it were his, he'd definitely make 4-5K changes a good insurance on longevity. I think we'll have regular FSS service done there from now on.
Before the change, the FSS was reading 5500. Right after the change, we put 300 miles on the car, and the FSS NEVER went up- in fact, it now reads 5300. Food for thought, your results may vary...