I was not very much impressed with the average fuel consumption when I bought my car and it was between 12 to 14 kmpl with branded diesel (normally HP - Hi Speed), but later I come to know through some of my EU country friends that it will improve after around 5000 to 6000 KM's run.

And I tell you all after second service at 6500, now I am very much impressed and satisfied with my decision of buying "Logan Diesel". In any circumstances I get around 18 kmpl in city condition like in Gurgaon and around 22 kmpl in highway conditions.

The best combination I observed for optimum fuel consumption is driving on 5th gear at the speed of 80 to 90 kmph.

Attached image shows computer reading of average fuel consumption.