I strictly use unleaded (as stated in the manual) for my Jazz 09. I assume it's the same for the City. I also try to stick with one brand, Caltex no reason really other than mas accessible sa akin.

Keep in mind that the automated gas computer also computes even at idle state. So if you're parked or in traffic with the engine on your mileage will be pulled down. I usually don't rely on the meter. I just compute the total distance I traveled divided by the number of liters I've pumped in. Seems more accurate that way.

I get an average of 320-330km per full tank with pure city driving. I've reached 420km when I did mostly highway driving.