Density Kit With Certificate

Density of fuel is “the mass of fuel per unit volume”. In some cases the density is expressed as a specific gravity or relative density, in which case it is expressed in multiples of the density of some other standard material, usually water or air.It's the volume that increases with increase in temp. If the volume increases with the decrease in density, then isn't there scope for petrol pumps to sell more petrol than they actuall bought.