Its not really the mileage on the carits more whether the car has been regulary serviced and parts changed according to the manufactuers service handbooku could get a car with 30k on the clock and only been serviced once were as u could get one with 60k which is regulary serviced and had stuff changed, yet the car with 60k would be as good if not better than the otherBMW, Audis, Honda, Toyota, VW & Merc diesel cars are the ones which will last long around the 200,000 mile mark and still drive like its new