Mine (2000 CC 7.3L) has just past the 222,000 mile mark, and having the only issue other than the CPS which everyone knows about, the tranny finally gave out at 195,000 miles. I do some pulling, I've got a 9,000lb camper, and when it's marching band season I pull the equipment trailer so that's probably pulling about 5-6,000lb's without much of a problem with my 7.3L. I change the oil every 5,000 miles fuel filter is replaced every 10,000 miles I give the new tranny a complete flush every 16,000 miles I had every now and then some 2 stroke oil to help keep the injectors lubricated up and happy. I hoping I get atleast 350,000 miles out of mine, which I should get no problem at all.