The maintenance reminder is not set to a specific mileage.... it's based on type of driving... IE: if you drive mainly city (stop/go) then it will be less mileage than someone that drives mostly highway miles. Also how you drive will impact... hard accelerations, driving in sport mode more than normal and/or econ, etc., etc. The determining factor is the oil quality not mileage which varies by the items described above. Here is a video that explains maintenance minder...