Since I put the new battery in about 3 months ago my valver is averaging 36.2mpg - which is a mix of conservative, and well... not so conservative driving. If I drive like my mum then it does 42mpg all day long. Lots of country roads and long sweeping bends that are too tempting not to attack on my way to and from work- albeit within the national speed limit though. Considering my mk2 16v only managed to averag 22mpg (although it was far from standard at 178bhp) then its quite good. No idea what I get from a tank as I've never measured it - but drive to work is 30 miles so 60 miles a day 5 times a week - 300 miles - and still 1/4 of a tank left most of the time.