Dear Brother, 1.First of all please do its engine tuning. 2.Change oil and air fitler timely. 3. Maintain your speed between 80 to 90 km/Litter petrol. 4. Please do not excelerate at once, Push it very slowly I have same car, on long route it consumption is 15 to 18 KM/litter Petrol, subject to our speed. how by doing above all, you will get good consuption.