According to the 2003 Ford F-250 Owner Guide :
With engine oil filter change :
The 6.8 liter V10 gas engine takes ( 6 quarts )
7 Quarts
56 quarts
A 2004 Ford F250 Super Duty Pick Up with 6.0 V8 Diesel engine requires 15.0 quarts of oil.
7.3L powerstroke takes 15L of oil.
6 quarts
If you are referring to the diesel engine, its capacity is 15 quarts, but if you are referring to the gasoline engine, the capacity is 6 quarts.
A Ford F 250 diesel truck takes approximately 14 quarts of oil. The oil needs to be changed about every 7000 miles.
2002 diesel 7.3 will ho;d 14 quarts of engine oil
15 qts including the filter change.
According to the 2008 Ford F-250 diesel supplement : With engine oil filter change : ( 15.0 U.S. quarts )
about 15qts
The 3.8 liter V6 engine in a 2003 Ford Mustang takes ( 5 quarts ) WITH ENGINE OIL FILTER CHANGE