I don't know if Fit 2007 is gasoline or hybrid, my hunch is that it's got a petrol engine, which could easily give you 15-16 km per liter or more. Back in 2017, my Toyota Altis 1.8l 2015 model gave 15km/l round trip from Karachi to Chakwal at a steady cruise of 120km/h most of the time, whereas my Vezel gave me 16.5km/l in Dec.2018 on a round trip from Karachi to Lahore. So you can have a pretty decent idea about the fuel consumption of your Fit.