My commute is around 17 miles each way, mixture of some town driving and motorway and I normally get 42-43mpg from my 53 plate 1.9tdi quattro. This is measured between fill ups as the DIS reads about 5% high. I normally get between 530-550 before the fuel warning light comes on.

I was expecting more to be honest when I bought the car, but it seems about right for a quattro and my car has done 119k.