@jz
its BEEN a week, and the car is goin wonderfully well mashallah. its fuel economy has increased. presently, ma car has done 104 kms inside the cantt and i still got my 3 CNG lites on (earlier, around 85 km, only 2 lites wud remain on). so i presume that the average is gonna be much better. moreover, i wud be travelling by road to islamabad around 20th of this month . wud post the averages on highways too Inshallah on both Petrol and CNG