43 litres

How Big Is The Gas Tank On A 2011 Ford Fiesta? Fuel & MPG EPA mileage est. (cty/hwy) 28/37 mpg Fuel tank capacity12.0 gal. Fuel type Regular unleaded Range in miles (cty/hwy) 336.0/444.0 mi. How much does a Ford Fiesta fuel tank hold? Ford Fiesta is capable of holding up to 43-litres worth of fuel