My trip computer is lying
Just been out in my 156GTA, and am slightly relieved that it is actually getting better mpg than I thought. But the reason it never really went over 20mpg on the infocenter wotsit, is that it doesn't know what a mile is (it is set to miles).
I had my suspicions when I arrived at my friends today who I know is about 35miles away, and the trip computer was reporting a trip of just over 20miles.
I was getting worried that the whole speedo was wrong, so on the way back I pulled over, reset the trip and then reset the trip displayed on the odometer. To my relief when I got home the odometer trip was reporting the mileage I was expecting, but the trip on the infocenter was only slighty over half the distance the odometer was showing.
Anyone else had this? the car is still in warranty fortunately, and I have tried doing a reset to defaults on the infocenter so I will see if that has made a difference.