For a car with a 30mpg average text book, I dont think 28mpg average is poor at all this time of year. Engines love cold air. More cold air means more fuel used. Summer makes cars more economical. Mine pulls like a train this time of year and the mpg falls from 45mpg running around to about 42mpg. Fuel tank capacity is 55 liters. Fuel economy in city is 8,7 lt/100km, Fuel economy in highway is 5,5 lt/100km and combined fuel economy is 6,7 lt/100km according to officially published data by manufacturers. Focus II Hatchback 1.6 Duratec 16V real World MPG/consumption is 9,1 lt/100km. It is expected to consume 37 percent more fuel than 3 days ago · See pricing for the Used 2008 Ford Focus S Sedan 4D. Fuel Economy. City 24/Hwy 33/Comb 28 MPG. Bore x Stroke. 3.44 x 3.27. Compression Ratio. 10.0. Fuel Type. Gas. Fuel Induction. Sequential eSlZWY5.