nhawan i do about the same amount and type of mileage as you but my mpg is around the 35/40 to the gallon. alot depends on the condition of the engine and the car itself. if regulary serviced and not abused (usually by previous owners) in the way you drive, the tyres at the right pressure, the list can go on and on. follow some of the other suggested ways to check your actual mpg and see what the final figures are. best of luck