Depends on your foot & driving habits. Generally speaking
In city:
11-12 with AC
12-13 without AC
On Long:
13.5Km with AC & 14.5 without AC --on motorway
15.5 Km on AC & 16.5 without AC -- G.T Road
Apart from brakes & skidding issue, this is an excellent model. Very very reliable, comfortable & cheap to maintain. In my personal opinion, it is more comfortable than the 2009 model i.e Corolla E-140, especially the back seat