MisterP: That is poor. Mine is averaging about 46mpg on its first tank, although I haven't driven it for 10 days, having been on holiday. Your commute is short and sounds a little congested, which doesn't help. I have noticed that my car's water temp gets up quicker than my Scirocco, but the oil temp takes just as long IMO. The MK7 seems to take longer in the journey to be economical, so is less suited to short journeys in my experience. If you don't get an improvement on your next tank or are plagued with regular active regens then you might want to get the car checked out.