My 1992 E150 has a 35 gallon tank so I'm guessing your E150 is the same even though it is only one year newer than mine.
20.86 Gallons
12.8 Gallons
16.0 Gallons
28 gallons
20 gallons
( 26.0 ) U.S. gallons in a 2001 Ford Windstar gas tank
98 Ford Escort gas tank holds 12.5 gallons.
12.4 U.S. gallons on a ( 2012 ) Ford Focus
In a 2003 Ford Expedition : ( the gas tank size is 28.0 U.S. gallons )
15.5 U.S. gallons
The 2005 is 19.0 gallons