i get 12 on heavy foot (my father) and i manage 14-15 (Hypermilling) inside islamabad on 1.5 prosmatec and on long last weekend achieved 25.33km/L on long route (drove myself and hyper-milled to every extent) (GT ROAD).
keep the eco guage above 20 and see the car do wonders :).
getting good average is no brainer, just be cautious about your foot movement.
peace.