Something is seriously wrong dude! Cuore doesn't give 7/8 km. I own Coure and it gives 13/14 with AC.
24x2 per day with total 48 KM.
48x5 per week with total 240 KM
1500 Rupee fuel 91.4/L
1500/91.4 equals 16.41 Liter fuel.
240/16.41 equals 14.62 KM per Litre
Ps. I only calculated my commute to and from work and did not add other random travelling.
Now you do the math, have the rings and pistons and valves checked.