I have an '01 7.3 F250 CC SB with 130K and have some fuel system issues causing poor mileage, engine clattering and overall sluggish operation. However, my manual calculation and console fuel computer agreed this last fill up at an average 17 MPG for an 80/20 (Hwy/city) mix. No mods to date but several are planned.
Interesting note - while driving 55 MPH with a direct headwind (approx. 15 MPH) on a flat stretch recently I saw a ridiculous 13.5 mpg
15 minutes later driving down the exact same stretch headed the other way but now with a 15 MPH tailwind I saw am amazing 24.5 MPG!! Previously on the same stretch with no wind at all I've seen 19 MPG religiously so it seems to work out mathematically - 19 MPG is half way between 13.5 and 24.5 MPG! Can you believe the affect wind drag has on my PSD - 5.5 MPG - and that's at 55 MPH - WTF?
