so is it my bad, 40+5 or 45+5 . or is it 10litre reserve after the beep? after hearing first beep i once did 180+km and filled 43 litres. is my fuel indicator gone nuts? btw do not rely on auto cut off in fuel pumps they do cut when too much of air bubbles reach the nozzle .just in case if you know how much your ride is going to drink , you may possibly save some bucks in case fuel gauges are tampered in gas stations. moreover certain auto cut off pumps happen to have feature to suck fuel back to sump to prevent overflow. when it shows a full tank ,shake the car which will let out air blocks and you will note you can fill in again a litre to three.