When I got to my car tonight, someone had left me a note saying they had a GTD, what was my MPG like because theirs was really disappointing. So I called them, they said their long term average was 45, it had been into VW who said there was nothing wrong with the car, but they also said that their lease company had arranged for an independent assessment of the car to be conducted over a 2 day period this week. They said they would let me know the outcome... I'll keep you informed.
Could be interesting, would really like to know the outcome of that independent assessment.
I think there are 2 reasons we're disappointed with the GTD mpg.
1. The 20% gains over the previous generation are bollocks, all tied in to the inclusion of the stop-start and it's effect on the EU cycle test results.
2. The MFD is so much more accurate than previous gen. Rather than being 10% optimistic, it seems almost bang on.
Add the 2 together and you get a car that is 30% less than advertised, pretty much what I (and plenty of others) have. If you had a Scirocco 170TDI or a MK6 GTD, with your actual brim fill mpg then you'll probably find you're no better or worse than you were before. For those that never had one, they might be expecting far more out of their MK7 GTD.
It's the people who drive these for work and get fuel reimbursement based on the book combined mpg who are really getting short changed - every mile they do for work is costing them 4.5p in fuel reimbursement shortfall if they get paid on 67mpg and the car is doing 45mpg (a mate of mine was in this exact situation until he bought an old Peugeot 306 to lay on the company miles).