start learning how to drive at 60 miles per hour if not then prius is not for you! since at highway speeds the steering wheel doesn't tighten up as much as a sports car so if you stick to driving slower you'll gain more $, listen to more songs and not having to worry about twitchy steering.

i got around 20 km a liter when i drove a civic 5 spd using advanced hypermiler techniques
and now I drive a salvage nwh20 prius that gets almost to 25 km/l with 192,000 km to date.