Sure , the 3.0 L flex fuel engine in a 1999 Ford Ranger runs on unleaded 87 octane but you also have the option of running on E-85 ethanol if you want to. (Helpfull)
The 2010 Ford Flex runs on regular unleaded.
The 2011 Ford Flex runs on regular unleaded.
The 2009 Ford Flex runs on regular unleaded.
The 2014 Ford Flex runs on regular unleaded.
The 2012 Ford Flex runs on regular unleaded.
The 2013 Ford Flex runs on regular unleaded.
With the 1999 Ford Ranger 3.0 liter flex fuel V6 engine you can use " regular " unleaded gasoline 87 octane or ( E 85 ethanol fuel ) or any combination of the two fuels
The 2014 Ford Expedition runs on flex-fuel (unleaded/E85).
The 2013 Ford Taurus runs on flex-fuel (unleaded/E85).
The 2013 Ford Expedition runs on flex-fuel (unleaded/E85).
The 2014 Ford Focus runs on flex-fuel (unleaded/E85).
The 2012 Ford Focus runs on flex-fuel (unleaded/E85).