The biggest enemy of fuel economy is erratic driving style. I own my RAV4 since March and I've clocked 22k km since then. The fuel consumption that I get is between 2l/100km and 14l/100km. It really depends on so many factors, but I've figured out that, if I do not think too much for it, I get better fuel consumption (also it may sound very strange but in normal mode, I get better fuel consumption, I've observed it on 5 tank basis, same routes, same ambient temperature). My average is 7,7, because of the fact that I drive fast when I am out of the city (150-160km/h). Last few weeks I had 2 tanks of only city driving and my average was 6.3l/100km. One advice from me - drive it like a normal car, it was optimized to be driven like that. Just try to predict the traffic - coast whenever you can, avoid longer than 5-10 seconds rapid accelerations and try to maintain stable speed (requires a steady foot), when you get up to whatever speed you want to get to (that is a key factor, because the sweet spot for a hybrid is to drive it on the edge - ICE produces barely enough power to move the car and 1-3kW of power are redirected to charge the battery, in this mode at 90 km/h I can easily get 4-5l/100km). Also avoid using the Cruise Control on roads where there is a lot of traffic - it produces a lot worse fuel consumption.