I keep all dockets as I need them for my car allowance, tax return stuff and the fading ones drive me nuts. I swear in some stations the cost counter starts winding around long before any fuel is coming at the beginning and I do often wonder in recent times whether they are measuring accurately. In my old job I had access to all kinds of measuring cylinders, if I was still there I would love to test some pumps out at times. It doesn't fill me with confidence that my usual suss diesel pump is quite often our of order and not because the tank is empty.