Adam... please correct me if I'm wrong. The owners manual does not gspecifyh any mileage for service intervals that I could find. That is the function of the FSS. Each time the FSS is reset it defaults to 7,000 miles. Thereafter the condition of the oil is analyized by the FSS sensor in the oil pan which in turn indicates how many miles are left before service is due. It could be on either side of the 7,000 mile mark, depending on the condition of the oil.
As of today my car has been 4,492 miles since the last oil change at 5k. The FSS shows I have 3,700 miles till the next service. That brings the interval between services this time around to 8,392 miles for my car.
There have been threads on the issue of oil change intervals in the past. Some folks opted for 3k, 5k, or 7k. 8.3k as indicated on my car could be considered by many as being too high and it may very well be. I donft know. However it is my belief that as long as you follow the schedule as indicated by the FSS in your car, the dealer can not void any warranty for lack of scheduled maintenancec you are after all following a computer generated maintenance scheduled based on the condition of your oil.