These are listed above by alikhan7. I do travel alot, in city like Multan and Peshawar it never goes above 12-12.5, in islamabad i achieved 13.5-14, on highway maintaining 90-100 i got 17, on motorway @110-120 15.5-16. Avoid sudden and frequent braking.
My rpm never goes above 3 on motorway and all shifting was below 3k rpm.