I wouldn't be surprised if the sunroof knocks a couple of MPG off tbh, but it looks so kool its worth it
I've only just noticed my current MPG recently too. I usually have the dash readout set to 'Average MPG A' (not quite sure what Average MPG B is there for though) and for ages it read about 41.3, only changed after a long journey.
I pulled up to a junction one day, look down and the readout randomly seems to reset itself! now it updates far more frequently i.e goes down about 5 seconds after I hit the Go Pedal but no idea why it randomly changed.
Cobra
I've only just noticed my current MPG recently too. I usually have the dash readout set to 'Average MPG A' (not quite sure what Average MPG B is there for though) and for ages it read about 41.3, only changed after a long journey.
I pulled up to a junction one day, look down and the readout randomly seems to reset itself! now it updates far more frequently i.e goes down about 5 seconds after I hit the Go Pedal but no idea why it randomly changed.
Cobra