Check your owners manual. If you don't have one copy & paste this link. http://www.genuineservice.com/genuineservice/en/gloveboxresults
15.7 U.S. gallons ( 59.4 liters )
According to the 2000 Ford Mustang owners manual it has a ( 15.7 U.S. gallon gas tank )
I have a 2011 Mustang and it has a 16 gallon tank.
20 gallon
15 gallon
15 gallons
16 gallons
13.6 Gallons
According to my Chilton's Auto Repair Manual : A 1989 Ford Mustang has a ( 15.4 U.S. gallon gas tank )
According to the workshop manual, the 2000 Mustang's fuel capacity was 15.70 gallons (59.42 liters).
According to my Chilton's Auto Repair Manual : A 1990 Ford Mustang has a ( 15.4 U.S. gallon gas tank )
15.4 gallons