NewGuy, to answer you, yes you can get 26+ in ideal conditions, I got close to 28 in city driving once, on a long stretch of road. Hitting 30km/l few times too

However, that's not going to be happening too often, and you can take an average of 18-20km/l as a more realistic figure or should say, most insighter's average, depending how you drive and how much city/highway its driven on.