myself, nothing terribly impressive, 2000 Hyundai Sonata(2.4l i-4), bought Aug 2001, with ~16k mi, Sold Jan 2010, with ~105k mi. so 89k mi in ~8.5yrs.
My Uncle, however, bought a 95 Pontiac Bonneville SSEI (Supercharged 3800 series II) new, finally got rid of it in Cash for Clunkers(aug 2009) with 300k mi. engine had been rebuilt @ 175k mi, trans... twice, first around 70k, took it in for service(that had nothing to do with the Transmission), and somehow it came back with a missing Trans plug and NO atf left in the system, not sure about timing of second trans rebuild