Ahh this is the hardest part.
There are just once upon a time checks;
Traveled to Islamabad via motorway, filled tank to full in Faisalabad.
It was me, mom and another person and approx. 70 kg of luggage and the left rear tire had little air- approx. 22-25 PSI.
I drove at 100km/h till Lahore section, then 120 km/h till Kallar Kahar and then realized I was running late, then at 130km/h till Islamabad with that stupid tire.
Refilled at that PSO near Motorway entrance ( air and fuel ) and the fuel average came out to be 13km/l.
AC was kept on and off- It got too cold on the way. so 50% on the way.
90% AC on the way back- ( I fell asleep on the way back srsly).
Once again, did Islamabad trip to Airport, 50kg luggage, me, mom and another person. Did the full trip in 44 liters- Again, 130km/h towards and 100km/h on the way back. AC was kept on 50% on the way and 100% on the way back.
Rajanah to Faisalabad, last winter, 4 times a week.
Speed- 80-90km/h, no AC and hypermiling- 16.5-17km/l.
In city with no AC- 14.5/15km/l.
With AC in Lahore ( Liberty market, Defence areas and 30 minutes idling with AC on- 13.4km/l.