Hi,
I get just under 100 miles from ?10 in my 1.8T, saying that, most are motorway miles, and I drive like a nun!
It does seem to make a difference on the time of year, i get much less MPG in winter, the highest MPG ive had on a 35 miler - 30 of which motorway is 44.3 which was last week (usually around 40).
I would have got the GT TDI if I'd known I'd be taking another job 6mths after buying 1.8T, but I cant fault the car at all, it's very very quiet, so quiet the wife tried to start it when it was already running!