I average 580km/tank, 80% highway 20% city driving with my average speed of 100kph. 120kph highway 80kph city. Winter temps of -10c.

With that, as others have said, you need a tune up.

Edit: I also have heard that the Zetecs get better fuel economy at higher speeds.

Last edited by Stephen; 03/25/05 04:39 AM.
96 Contour, GL, Zetec, ATX. 03/18/1996 Build Date. Drop in K&N NGK Laser Platinum Premium Spark plugs Niehoff Premium Ignition wires Wheel Well Air Intake Resonator removed. *Just the beginning* 2000 Windstar SEL K&N Air filter