go and get ur honda city ecu reprogrammed those of my bros who are getting knocking on petrol or CNG... simple as that...
the car performs excellent on every fuel. CNg and petrol. but the fact is that one can't save that much when he spends something over 75k Rs on a CNG kit and saves 1 rupee a km.
yes indeed.. only a rupee. cz if properly driven, city can give over 20KMPL...