i have a 1.6 stylance and last tank i got 640km's from brimming it to fumes. i dont dog it but there was a good mix between town and motorway driving. i have used injector cleaner recently though and its made a slight difference i've found. it can go below 500km around town easily though. my car has about 34000km on it so slightly higher than yours.
I'd be interested to see what people's general impressions were re: injector cleaners etc. There must be enough pooled knowledge on here for a fairly representative view on whether they're any good, and if so, what kind of changes they make.
For the thread though - I've had my 2.0 TFSI FR Leon Mk2 for two weeks now, and am averaging 27.4 mpg. Am hoping to get that up - over the coming weeks, but we'll see.

So do I even 6 months on