Congrats Buddy, City has been the bechmark for a decade now...your FE figures are too good considering the fact that th citys got a bigger 1.5 ivtec engine. I recently got a mx FE of 19km/lt in my new jazz which has a 1.2lt engine. So your FE figures are even better I must say...
The ARAI mileage of both Honda Jazz and pre-facelift Honda City are same at 16.7 kmpl although City has a more powerful engine.
However, the facelifted Honda City's ARAI mileage is 16.8 kmpl although there is no change in engine and transmission . Guess it is something to with the new bumper design (more aerodynamic?)