What do you do when you go for filling your fuel tank? You tell him how much you want, and you are busy opening the tank key, and digging up money to pay for it. Most of the time, we don’t notice whether the meter is starting from zero or not. These digital meters are designed in such a way, when the pump handle is kept its place, the meter is adjusted to zero, by default. But, these pump operators are clever and don’t put the handle completely and the meter never sets to zero. If the customer before you has bought just 30/- or so, unless you check the zero reading, you won’t be able to tell whether he has actually zeroed it or not. I have observed this being done at many petrol bunks.
Be a little attentive, and demand the pump operator to zero it before he starts filling fuel. After all, we want to get the worth of our money!