The 2013 Ford Flex runs on regular unleaded.
The 2012 Ford Flex has a 6-speed automatic.
The 2010 Ford Flex has a 6-speed automatic.
The 2009 Ford Flex has a 6-speed automatic.
The 2011 Ford Flex has a 6-speed automatic.
The 2014 Ford Flex has a 6-speed shiftable automatic.
The 2013 Ford Taurus runs on flex-fuel (unleaded/E85).
The 2013 Ford Expedition runs on flex-fuel (unleaded/E85).
The 2013 Ford Focus runs on flex-fuel (unleaded/E85).
The 2013 Ford Explorer runs on flex-fuel (unleaded/E85).
The 2013 Ford F-150 runs on flex-fuel (unleaded/E85).
The 2013 Ford Mustang has a 6-speed manual.