Dear today the fuel prices are very much high. so in the preview of high fuel price we need to save fuel or get maximum milage by our vehicle. firstly we purchase our fuel i.e. petrol or diesel from the reliable filling station. second we must fill our car in morning hours or late night hours. then u start doing this thing u surely see the difference in milage.it increase the 10-20% of your milage due to the density of fuel is maximum in morning & evening hours.