Thank you so much for the replies
Tyres were 17inch i used to get 6km/l. Then I reduced the size to 16inch i.e. according to what it says on the door side of the car but still same 6km/l which is very saddening. Tyres are all 30psi. Thanks for the clarification about the fuel pump - it starts and accelerates great it is a joy to ride.
I drive with a light foot and very moderate acceleration.
Any expert advise as to how I could improve the mileage would be appreciated. Thanks