another measure of fuel economy.

[RobtheFiend]

Bugatti Veyron owners probably use the same measure, 20 UK gallons of fuel gone in 15 minutes, in full speed.

And in your case, since you don't go anywhere while driving or go very slowly, it is a measure that makes some sense indeed.

I also gave some thought why knowing the range is important for me, and on the motor/highways there aren't that many fuel stations, probably one every 30-50 km in some places. Running out in between them wouldn't be nice at all.

I made sure i had a can of petrol in the car, drove until the light went on, reset the trip meter(?), and drove until the car stopped. 120 km after the "low fuel" light came on, 40 km after it started blinking. So now i know.