Until you have done at least a couple of thousand miles, there is little point in measuring the MPG
The car has to run in.
Indeed you will only really start to see what the car can really do after the first oil change/service
XC40 2.0 B4 FWD mpg issues
We have had our B4 since September and its hardly done any miles (6-700). I have not checked with my own calculation but the screen MPG seems to show low 30's pretty much all of the time. Considering the nature of the journeys I think that's not too bad.