Buddy you are getting too poor fuel average!
I drive 370Kms approx. in 2300Rs of fuel i.e.. roughly +/- 30 litres.
The mileage I'm getting is 13km/l as now AC is not being used. And don't think i drive with a light foot, I drive as fast as car can go and the road can permit.
With light foot I used to get 14.5 km per litre approx.