According to a local dealer ad, the 2007 Taurus (only sold as fleet vehicle - not the '500' renamed Taurus in 2008) has an 18 gallon tank.
I was looking at the 2007 Ford Taurus Owner Guide and it doesn't show the fuel tank capacity . The ( 2006 ) model year has an ( 18.0 U.S. gallon / 68.1 liter gas tank )
The gas tank on the 2007 Ford Taurus holds 18.0 gal..
16 gallons
On a 1998 Ford Taurus : ( 60.6 litres / 16.0 U.S. gallons )
68.1 liters ( 18 U.S. gallons ) in a 2000 Ford Taurus
According to the 2002 Ford Taurus Owner Guide : ( 68.1 litres / 18.0 U.S. gallons )
For a 1991 Ford Taurus : According to my Chilton's Auto Repair Manual : ( 16.0 U.S. gallons or the optional extended range tank which is 18.6 )
The 2007 Ford Fusion gas tank holds 17.5 gallons.
68.1 liters ( 18.0 U.S. gallons )
68.1 liters / 18 gallons U.S.
60.6 liters ( 16 U.S. gallons )
14.0 gallons