How to improve the mileage of Tata Nano?

my father just bought a new tata nano two days back. When i took the car to my home, some of the uncles were talking to my father saying that this car is rubbish it does not good in terms of mileage.

My father is in a worry since we bought up this car as to have a car but our main constraint was that the car must deliver atleast more than 15 kmpl , but as per the real users it seems that we choose a wrong options.

I though to share this problem of mine with you all. Could anyone suggest me what can we do to improve the overall mileage for this car.

There is no secret to get good mileage from a car, few things can be considered though..

1. Maintain moderate speed,
2. Avoid harsh / quick acceleration and brakes.
3. Use good quality fuels.
4. Get your car serviced regularly.
5. Never ignore any sign of damage include sound, strange behaviour etc.

There is nothing much you can do actually.