I just got my first oil change just after 3000 miles on mine. When I scheduled it, I was asked how many miles were on it and told them, he said Ford recommended it every 7500 miles, but they suggest every 5000, so I shouldn't need it yet. I told him the warning had come on (like you said) and was @ 2%. He seemed a little puzzled by that, but I told him it'd been 6 months anyway, so I'd just get it done. He said that the computer calculates it based on time, mileage, and level of aggressiveness of the driving. Don't know if that helps, but it was my experience. It sounds like you changed the oil yourself, did you reset the computer when you did it? Maybe it was still counting down from the previous change. (Anyone know how to reset the countdown by the way?)
