7.3 or 6.

[AnnieG7]

How can I tell if my 2000 F250 is a 7.3 or a 6.? And what can I do about the awful mileage I get. I bought it new and it has always been terrible. Does it have a catalic converter? Can I get the exhaust redone? What can I do.

 

[1970Custom]

You've got a 7.3, 6.0 didn't arrive until '03-'04...

What's horrible milage, low teens to mid teens?