poor fuel efficiency

Look and Style   Comfort   Pickup poor pickup in second gear, specially when car inslow motion and try to pick it on 2nd gear. Mileage   Best Features   Needs to improve   Overall Experience honda company is claiming the fuel efficiency as 19.4 km per litter on highways and in city 14-15 km per litter. i have purchased BRIO in the month of May and i get hardly 10 - 10.5 in city and on hignway 15.5 km per ltr. priviously i had a Santro and i use to get 12-12.5 in city and on high way 16-17 kms per ltr. where as Hundai is claiming only 18 kml for santro. honda company should re check the engin of the brio for feul efficiency as cost of petrol is going up day by day.