Apart from it being such an efficient little engine? I can't big up V-power or Millers any more as I stopped using those a few thousand miles back.
Can worn tyres skew the figures, as in there's less circumference than new? The front's are on the limit and the rears not far behind. I guess now would be a good time to get them replaced and see how the second 2500miles pans out.
I imagine my mellowing driving style has something to do with it though, plus there's no mountain ranges to climb round here (just a gentle incline sees the real-time economy plummet) and way too many restrictive 40/30/20 zones. I'm usually in 5th gear before I reach 30, let the cruise control do the rest and it's amazing just how far it'll roll off-throttle in gear when approaching junctions. What with the torque, I don't need to pedal it much anyway, even on the nationals.
Yes, I'm sort of hypermiling it in that respect but it doesn't seem to disadvantage me compared to those that race to the next queue/junction as quick as they can. I make a game of cussing myself if I have to use the brakes, therefore wasting fuel.