Cng is more ecnomical....even in vtec engine
d15b even gives around 120km in city in full cyl or app 400 rupeeess which is 3.33/KM
on petrol in 400 rupees u get 6.06 liter of petrol which
with 10km/l will give u 61km
with 12km/l will give u 73km
with 15km/l will give u 92km
with 18km/l will give u 110km
with 20km/l will give u 122km
and on long route cng gives almost double of local millage