Some people feel its unrealistic, but I have my city that gives me 21 Kmpl on highways.
With one full tank of petrol, I can go to Peshawar from Rawalpindi, two times.
The tank gets filled up for 2300 rupees (on auto stop).
My Suzuki Alto used to consume about 500 rupees of gas from Rawalpindi to Peshawar, and City 09 burns about 575 or 600 rupees of Petrol.
Why would anyone fit CNG in this car? CNG kit is not free. CNG is also not free. Of course?