Originally Posted by 44magnum
Sorry to burst your bubble but the mpg calculaters on these thing suck. completly worthless (do a search and youll see) f450 with 4.88 no way in heck. Do the math and youll find it to be way off.
Yup, they are pretty sucky, but not worthless. Or they were. Took mine in for the "customer satisfaction update" I kept getting letters from Ford insisting it wasn't a recall but that I should bring my truck in soon. The service manager called it an ECU Recalibration. And for the past 1000 miles the Fool Computer has been pretty darn close. Previously it would show 25 MPG for 20, and 13.8 for 11.
Facing 700 miles this weekend. We'll see.