Assuming it's the North American spec, 14 gallons.
The gas tank on the 2005 Ford Focus holds 14 gal..
The 2005 Ford Escape has a 16.5 U.S. gallon tank.
pour it into the overflow tank
14.0 gallons
13.5 Gallons.
About 13 gallons.
12 gallons
I believe it is 11 gallons.
A 2005 Ford Excursion has a 44 U.S. gallon tank ( 166.4 liters )
passenger side fender well
50 liters ( 13.2 gallons U.S. )
According to the 2001 Ford Focus Owner Guide : ( 50.0 litres / 13.2 U.S. gallons )