Are all of these figures based on the Trip Computer read out or are people doing proper brim to brim tests/calculations? I am in the market for a car soon and am seriously considering the Altea. If these figures can be relied upon then the case for one becomes stronger still.
PS. I am not saying that you guys are not reliable, just that I have had wildly differing values from my trip comps in the past, whereby it says ~50mpg but I am actually only getting 41. (this is a Longbridge vehicle though so that may explain it, gawd bless em!)
PPS. Oldtimer is right, don't forget to check that air filter is not blocked, tyre pressures are correct etc. These things can have a surprising effect on a cars fuel economy.