Shaukat bhai, Mine Altis 1.6 has just crossed 1000 KMs mark. I topped up the tank, reset the average meter, and took the car on 185 KMs highway drive with AC ON during 95% of the distance covered. Average speed maintained was in between 80-90 Kmph mark, and I got 13.1 Kmpl average. This includes 30 minutes idling with 100% AC ON due to traffic jam, else average could have easily touched 14+ Kmpl mark. Your car has been run more than mine, so the average of 11.8 Kmpl on long route seems to be on the lower side, as mine has been run for 1000 Kms only, and is already touching 14+ Kmpl mark on long routes, Alhumdulillaah.