Mine with 5w20 oil, 30psi in all tires and full time AC gives around 10.5-11kmpl but my travelling is on Canal Bank road lahore.
Otherwise 9-10kmpl is the best you will get.
On highway it manages 14kmpl at 120kmph.
With AC without AC doesnt make a difference.
Try to keep the torque converter engaged as long as you can and it ll be good.
Average is good given a lot of automatic glis do not cross 10kmpl in city.