However, Ford can only officially say that the 2012 Focus attains 40 mpg when equipped with the Super Fuel Economy package and six-speed automatic transmission. Ford is eager to prove that the Focus is more fuel efficient regardless or its options, so the American automaker organized a media drive in Romeo, Michigan.
Ford invited reporters to drive the Elantra at a steady 45 miles per hour around the 2.5-mile track. Then the reporters drove a Focus without the SFE package and lapped the track at the same speed. Conditions were equal for both cars and an engineer sat in the backseat, monitoring the fuel economy. The results showed that the average fuel economy of the Focus was 40.4 mpg and the Elantra achieved 37.8 mpg. This proves that the Focus is more efficient at a steady 45 mph than the Elantra.
[Source: Automotive News]