The Ford F2 50 gas tank has a stated capacity of 33.4 gallons. There is an option for a second gas tank of which will double the capacity.
28 Gallons
And your question is?
I am assuming you're asking about a diesel engine. On my 97 Power Stroke it is located on the drivers side of the engine, just above the oil filter.
According to the 7.3 L - diesel supplement with the 2000 Ford F-250 : Motorcraft 15 w 40 Super Duty for temperatures 30 degrees Fahrenheit and above Motorcraft 10 w 30 Super Duty for temperatures below 30 degrees Fahrenheit
The new 2011 Ford Super Duty. It has the 6.7L Power Stroke Turbo Diesel V8 mated to a 6-speed Heavy Duty Torqshift Transmission that doesn't have to be serviced until 150,000 MILES! 'Diesel Power' magazine recognized the new 6-speed to be the 'Allison Killer!' This setup makes a class leading 400 horsepower and 800 pound feet of torque.
I was looking at the 1999 Ford F-250 Super Duty , 7.3 liter Diesel Supplement and it shows : With engine oil filter change : ( 15.0 U.S. quarts )
It could either have a gasoline engine or a diesel engine
The 2015 Ford F-450-Super-DUTY runs on diesel.
The 2014 Ford F-450-Super-DUTY runs on diesel.
The 2010 Ford F-450-Super-DUTY runs on diesel.
The 2011 Ford F-450-Super-DUTY runs on diesel.
The 2013 Ford F-450-Super-DUTY runs on diesel.