@NonComposMentis read your post now - It dates back to January so you must have drove all the way up to mirpur w/o AC.
Guys, I have driven to mirpur on a new idsi two weeks bk and the fact is that I thought that the fuel guage wasn't showing correct level of fuel. I went with full AC at 90-100 km/hr. (I filled the tank from the same CALTEX F-10 @NonComposMentis).
On reaching mirpur, the needle was just a little under F - Not much - Not even a quarter tank seemed used. I didnt get a refill at mirpur.
I had some business at pindi on my way back so I took the mall road. At Ayub park the fuel guage showed only one quarter was used.. I was fairly happy - Then I wasted 1.5 hrs of fuel in pindi (you can imagine) a Saturday 12 Am.
On reaching home the fuel guage still showed not half a tank but over (less than a quarter) though. Parked it - Didnt use it for 2 days. Third day went for a refill at the same CALTEX F-10 and to my horror they filled 999 Rs worth petrol in it which is about 18.6 liters. The odo meter showed 254 kms and my average appeared to be 13.65 which was a notch lesser than what I get with in city (I get 14+ here within Islamabad). I however look forward to my next trips to mirpur - especially in winters