In reply to katietoday: Ford Focus TDCi 1.8, five years old. 50 litre tank - 45mpg give or take.
If I'm careful on a long journey and use decent fuel then I'll get 500 miles, but running around town or belting at high speed on the motorway it's more like 430-450.
Have noticed a big difference between decent diesel (Shell, BP standard stuff) and cheap fuel (Morrisons especially, but also Tesco). Morrison's stuff, even on a really careful motorway run, loses me about 50 or 60 miles. Sainsbury's seems to be on a par with the big boys though, and as that's usually cheap on my way into Stockport, that works pretty well for me!
C-: