TVS apache RTR 160 or Yamaha FZ16 or TVS apache RTR180?

Am confused between these bikes. I dont know what mileage should i expect from the new FZ16. The showroom people claim a mileage of 40 45. Same for RTR180 and RTR160 45-50 .
My daily commute is only 13kms.
Have driven both the bikes love the way FZ16 handles you on the road and love the power RTR gives you.
So i need some sincere advice from people who own these bikes.

Somewhere back of my mind i inclined to get an FZ16 but my only concern is mileage.
Even to mention that i am not a rash driver avg speed of 45-60.
Need help!!!