Yes, the civic's fuel tank is wide and flat. Filling up with 5 litres is just not enough for the floater in the tank to detect the change. A minimum of 10 litres should make the needle move.i'm new civic owner, 1.8 (08 model on 09 plate). anyone else notice if you fill only 5 or so litres when the gauge is just above red (computer showing about 22 miles remaining), that it doesnt shift the gauge at all or alter the miles remaing??