You should be so lucky!!!
Ive had my 170 for just over a year now and suffered the fuel injector problem.
Ive had all four(4) injectors replaced in December, checked on vagcom so i know its set up and running correctly.
My commute is about ten(10) miles on the motorway at 80mph with the cruise control on most of the time, four(4) miles at 50mph again on the cruise & then another three(3) miles in moving london traffic.
From a full tank i get between 500 & 530 miles.
That equates to 27-28 mpg :(
I am 99% sure this is due to the car running at over 2000rpm most of the time with the turbo boosting.
If i drove at 70mph in 6th, its just under 2000rpm and the mpg is considerably better.
Time is precious with a familly so admit to breaking the national speed limit, if i left earlier i could save a small fortune in fuel bills.
If you want better figures you will have to alter your driving style.