According to the 2006 Ford Focus Owner Guide : ( 14.0 U.S. gallons )
According to the 2006 Ford Mustang Owner Guide : ( 16.0 U.S. gallons )
18 gallons - according to the owners manual
The fuel tank holds 28 US gallons
The gas tank on the 2006 Ford Taurus holds 18 gal..
The gas tank on the 2006 Ford Fusion holds 17.5 gal..
The gas tank on the 2006 Ford Focus holds 14.0 gal..
The gas tank on the 2006 Ford Mustang holds 16.0 gal..
The gas tank on the 2006 Ford Escape holds 16.5 gal..
The gas tank on the 2006 Ford Explorer holds 22.5 gal..
The gas tank on the 2006 Ford Expedition holds 28.0 gal..
28 gallons , according to the Owner Guide