My 1995 f-350 crew cab has 319K on it and all I have done to it is 2 sets of ball joints,swapped the auto for a 5 speed ($2000 to do),waterpump,alt twice and I just put a full set of injectors as one went bad at 291K.
It gets an average of 16.2mpg with 37's and that is used as a crewbus in the...