this is what I observed: If I drive with feather light foot all the time, with no sudden accelerations; I won't get more than 10.5 on my car. If I drive fast, with sudden accelerations and sometimes coasting/gliding; I get around 11.5. If I provide a sudden push to my car to my desired cruise speed, then lift off the pedal and then apply feather light force again to the pedal and let the car glide/cruise then I get 12.5
By the way, yaad aya. This thread was for comparison between swift and city and here I am talking about fuel average of Corolla. lol. Sorry OP