@jiggerzzzz
boy im driving vitz 05 since aug08
its really good car as far as power is concerned change plugs with its genuine irridium plus mobil oil, air filter etc
i asked many mechanics for CNG but they said it has fixed tappid so it cannot run on CNG for long period engine will get out of order after 15000km to 20000km
BUT petrol average is EXCELLENT im getting 12.5 to 13km with AC in city as i travel ravi road, ravi bridge etc traffic jams extra busy traffic but still im getting this average, i must say if drive in posh areas then i can easily get more than 13km