It will give you 10-11 max, if you are in khi due to short routes /traffic with AC... woh be with careful light foot
4000 RPM is too much . Consider doing under 2500 might can get you 13 thats it...
Enjoy the ride Or you can always switch to JDM they are fuel efficient although i dont own one but i've heared from many of my sources.
Dont expect too much.. 18 HA HA