Here are some numbers for my 25d.
But I do not think the car reading is really correct or useful. I admit - I simply haven't reset it since picking up the car.
Now done, so let's see later.
However, I sometimes use the ECOPRO analyser app, and recently (23/2) I had a longer trip at the motorway.
I do not really care for the ECO mode in the car, and drive 98% in Comfort mode.
The app shows quite nice result for that trip, and an OK average result since I installed the app (5.6l/100km).
Cheers,
Bent