Wow, 13 & 16 is really a good avg ~ I have received a few similar reports in the past, but again ~ avg varies person to person & as we all know there are many factors @ play.
Btw brother, did you calculate the avg via desi method ( fuel tank method ) ? I call it the special method " trip meter method". Did you conduct the test multiple times ? Did you take the mean of all values ( average value ) or was the test only conducted once ?
I'm from lahore & was born in lahore ~ Imo, lahore is already over-populated. Sorry a bit out of context ~ have the water issues resolved in karachi? No water for 6+ days ~ according a relative.