Aerodynamics is boxy Ford Flex?s secret weapon that produces mediocre fuel

At 55 mph, the Flex needs only 8.90 horsepower while the nearest competitors in the full-size crossover segment - the GMC Acadia and Toyota Highlander - require more than 9.30 horsepower. Moreover, the Flex's coefficient of drag is significantly better than all of its Asian competitors. Flex tests at 0.355 coefficient of drag while the competitors are at 0.375. By comparison, the 7-year old Acura MDX 7-passenger Luxury SUV/Crossover has a .36 Cd. Since 2001 in fact.