Consumption is totally depending on driving style and road.
I have driven about 1800KM, my minimum with AC in local is 11km/l where as Maximum i got without AC and non stop up to 90km/h speed was 20km/l
In normal condition it gives 12km/l to 16km/l.
When you reach your desired speed slightly reduce accelerator, it will change the gear ratio and echo indicator will on. If you push accelerator it sense that you need more power and gear ratio will be lower.
This is what i learn by driving BRV.