the psd's do well on fuel economy.
it was the 6.4l out of all of 'em that didn't do so well.
Ford Truck Enthusiasts Forums - Garage Fuel Economy
i do pretty decent considering my setup and full time work use with the indirect injection.
p.s. how come im all alone reporting and tracking mileage.come on people lol.just check your odo's to gps and or google maps or the like,to make sure your accurate first.false reports and guestimates would be crappy.