2002 DSI 1.4L SE with amost 130,000 miles on the odometer, owned for around 4 years.
Generally returns around 55MPG, running around this rural area.
With regards AC and whether or not it affected the fuel consumption, the car was always averaging around the mid 50's mark but on a run with 4 adults and one young child, plus AC on full bore the car returned 62.1MPG
Since then, the record has been 73.1MPG but I once reset the meter at the top of a hill and saw 150MPG but that doesn't count at all
I can regularly achieve high 50's to 60MPG on A roads but it dips down to 46~50MPG on the motorway.
This car gets way better economy than my old KIA Picanto but it had some very quirky MPG results that were all over the place.
I drive a Hyundai i20 CRDi most of the time and that's had as much as 82.6MPG but usually returns mid 60's to 70MPG.