@mickypaki.
Your personal experience for the past 4 years? Okay. so you are talking about the older civic. My personal experience with my 2002 prosmatic is the same. (8.5-9 km/L even with HiOctane!).
Lets see what the new Civic Prosmatic does.
@killerboy. If you see this thread, please let us know what km/L you are getting. (manual or auto?)