Here is where good old bust your butt work comes in. When I rotate tires I inspect the pads, clean and lube the sliders. This way every 6k you stay on top of pending problems. Wife 02 Explorer did not need new brakes till 64K all original. My 07 El Limited Expy has 46k and plenty of pad left. This is also where getting FREE tire rotation is really crap. You know they do not inspect or lube the parts.