During the 6 years lets say you have driven 100,000KM
If you are car is hybrid doing 20 Km/L - you need 5000 L x Rs.160
running cost is 800,000/-
But if you are car is petrol doing 10km/L you need 10,000 Litres x 160
1,600,000
Saving is 800,000
for the battery, you have spent 320,000...