good millage

Hi people I am writing this performance review after the 2000km service of my car and first fuel top up thereafter. I picked my Maruti Suzuki Ritz LXI on JAN 2010. I Am close to 5000km of running.  I work out kpl from fuel tank top up to top up using the trip meter. After intial one month the vehicle started giving me a kpl of 17 – 18 with Non AC on in city traffic of Shimoga. it giving me a kpl of 20 – 21 with Non AC on Highway,  Now it is giving me 16 – 17 kpl with AC, coz I use the HVAC in winter. Have taken it with ease to 120 kph with family sitting, till a stern warning with matching intensity glare from you know who made me come down closer to sanity. There was still pep left and the engine and the car had good grip of the road and good feel on the wheel. The engine responds very well to even slightest of pressure on the accelerator in all gears. Extremely helpful in those short fast burst required at times in the city. The speed range of the gears is wide and assists in the above case. The key to good average I have found is keeping the engine RPM around 1600 to 1700 rpm. At this let me add it touches 75kph in 5th gear. Have taken it out on a highway but cannot comment on the average there right now. However, the handling is extremely good. Have experienced excellent braking performance both at high speed and low. ABS actually lets us handle the turns and occasional zig zag of overtaking very well at all speeds. The engine leaves you exhilarated with responsiveness even if for overtaking the veh has to climb from 100kph to 120kph on highways.