bro , the milleage u r having on highways is ok, my frnd used to have 2005 city idsi, he is having full Ac + 5 ppl on board with lugage, approx 18-20 km/lit on motorway at 100 km/hr speed ,
in city he is having 13-14 km/ liter , might here in isb not that much traffic, so its may vary for lahore, as its 1st or 2nd gear game there, i think if u touch 10 , it would be fine ........
best wishes bro .