I got 18.4 km/ltre on Altis 1.6 on GT road from Islamabad to Wazirabad which is quite interesting for me.
The details of journey are:
Distance Travelled: Around 157.8 km
AC: ON all the time
Fuel used: normal not Hi octane
Stops: one 10 min stop with engine and AC running
Average Speed: 70 to 80km/hr with brakes and passing city traffic
I can easily get above 19 or above 20km/ ltre if
1. I use mixture of Hi octane and normal fuel
2. I donot use 10 min stop with engine and AC
3. If i try to maintain average speed of 80 to 90km/hr
4. If i use motor way and do not use hard braking on traffic of passing cities.

