Motorway driving in the valver is a dream ... Perfect fuel consumption and smooth driving!
But for your information ive been using my trip meter now as my fuel guage doesn't work properly and I dont have the money to sort it out at the minute, although ive done some investigation and know what the culprit is.
Basically with £15 - 13 litres of fuel I get 55-60miles.
With £10 - 8litres I get about 40-45miles.
Thing is, this is intown driving with sensible and foot down moments. Ive got 10mm leads, exhaust from catback and a K&N which all contributes to the guzzling of fuel.
EDIT: My tyres are always inflated correctly whenever i visit sainsburys ... so 29psi on rears and 32psi fronts. Cars a 5 door and I usually drive solo.