you ask for petrol for Rs. 100, this petrol pump agent presses one button and Rs.100 will be displayed, actually 1 Litre is the petrol will go inside your bike. Again if you ask for Rs. 200/- petrol, he presses another button, which shows 200 in the display, but only 2 litres, goes inside your bike. IOC means cheaters, same as with HP and BP also. If we cheat , will they tolerate us?