The computer is actually constantly calculating ur fuel range based on the last 50km fuel consumption... so ur fuel range will fluctuates... for example, my ride usually gets 1080km to empty immediately after i fuel it up... then it drops to ard 800km (the fuel range) after only about 100km of city drive, and if i need to travel to the north on highway, the fuel range increases back to ard 850km and more sometime, of course it depends on how i drive the car... i drive within speed limit most of the time...