Average 13-14 kmPL in Mumbai even after 2nd service

Exterior

 Good

Interior (Features, Space & Comfort)

 Have installed MapMyIndia 8 version for music, gps, and rear parking camera view 

Engine Performance, Fuel Economy and Gearbox

The fuel economy of top variant diesel (1.5 VXMT i-DTEC) after running 5111 km and second service remains at 13/14 KMPL in mumbai city and 15/16 KMPL on highway (Mumbai-Pune Express way), much below claimed or projected figure of 25 KMPL and declaration of being the best fuel economy car in India. Service supervisor assured that fuel economy will get better after the 2nd service which was carried out after 5000 km. However, i have not experience any improvement, so far. It is highly disappointing. Is it an isolated case or are there other user with such experinces?.  

Ride Quality & Handling

 Good pick up

Final Words

Can someone elabarate what could be the reason for such underperfomance in term of fuel economy. 

Areas of improvement

 Interior flooring get stain easily which is difficult to maintain.