Don't let the Top Ford sales thing fool anybody. Ford owns Hertz car Rental and owned Hertz Equipment Rental for over 20 years. In other words they sell to themself! Big misleading advertising. I worked for Hertz Equipment for several years and about 100,000 cars, trucks, Dump trucks, Roll Backs and Crane Trucks go the Hertz every year and we hated Fords just as much as anybody else did. To be honest I never saw a new F450 or F550 service truck (about 100 trucks) go past 25,000 miles without having major engine problems. Some so bad engines had to be rebuilt or replaced the motors. Not trying to bash Fords, just telling my experience with 'em. I now have a 2005 Chevy Duramax and it has it's share of problems too.
Steering box and sterring shaft had to be replaced at 35,000 miles, AC worked on and still not right, transmission has issues, leather armrest just ripped in about 10 places. (It only has 95,000 miles) I have hardly ever put a dent in a vehicle, drive it like Grandpa and service it more often than I should. It's probably just my bad luck!