Ford hands down. I have a 96 F450 407,000 and she still runs great. Motor has never been opened just fresh oil every 5000. My 07 F350 Has 50,000 with no problems. my 05 2500HD has 18,500 and never gets driven when I have a choice it is always the Ford

PS trades a 03 S500 for the 07 dealer didn't know what to do. I think his daugther is still driving it.