in 1972 I could get 6 liters for Rs 10/. But it was not that costly earlier. in 1968 it was less than one rupee per liter. In may be 1965 it was available for around 3 rs per gallon ( one gallon = 4.5 liters.) More information could be obtained from petroleum ministry or dealers. However this information is of no use. since fossil fuels which are not renewable would continue to be costlier each day.
