Standard GTI:
Around 350 to possibly 450 miles per full tank. Don't keep an eye on my consumption really as i feel i'd lose some enjoyment out of driving the car if i was constantly watching my MPG. Unless of course i was on a long 2 - 3 hour journey, then i will see what the highest it can reach is in that time for a bit of fun more than anything. Its not always about performance for me so i get enjoyment out of driving at all speeds.
I mostly do town driving then on any 60/70 roads i tend to give it a short but quick push up to speed limit then knock it into 6th again. So mixed modes of driving. Im quite happy with the amount of mpg i get considering its a 2L turbo and my old 1.6 FSI didn't do much better in terms of milage per tank.
Highest MPG i've had is 42.7 when i first got the car and haven't seen that figure since.. Had 40.2 once or twice but that was after maybe 15 miles and the car had warmed up and also using 6th at 30ish. i could manage to get 30MPG or very close too, after 2 mile of driving without waiting for the car to warm up when idling as i know some people tend to sit in their car for 5 minutes or so to warm but i choose the method of get moving and just keep it under 2k revs until its warm.