Have to say that I avoid short runs as much as possible (wouldn't think of driving to local shops 10mins walk away) plus I live in a flat part of the country with very few hills. I have no doubt I would do much worse in the Yorkshire Dales.
The 2006 Ghia does not have an instant fuel reading for some reason - is it possible to re-programme to get this?
You can programme the Focus to have instant fuel readings. You'll need a laptop, the free FF2 software which you can find here: http://www.fordowner...nd-ff2-program/
... and one of these:
Very worthwhile thing to do. I love mine! Use it all the time.