According to the 2003 Ford F-150 owners manual :
With engine oil filter change :
( 6 quarts ) for the 4.2 liter V6 , 4.6 and 5.4 liter V8 engines
6 quarts
6 quarts with filter change
6 with a filter change.
5 Qts. of motor oil ( 6 quarts with filter )
5 quarts
6 quarts of oil
I believe that is ( 6 quarts - U.S. ) with engine oil filter change
6 quarts
7 quarts
3.5 Quarts!
5 Quarts
( 6 quarts ) with engine oil filter change