Filled up my car last night, did about 30 miles, mainly 30/40 limits, a bit of Dual Carriageway and 60 limits. Driving fairly gently but generally driving at the speed limit, and with a couple of overtakes. With air con on aswell. Got home and the computer was on 41mpg. So probably about 39 real. I'd say there's something wrong somewhere if you can't get that from a 1.6!!