According to the 2003 Ford Mustang Owner Guide and the 2003 Ford
Expedition Owner Guide :
With engine oil filter change :
( 6.0 U.S. quarts of 5W-20 ) are used in the 4.6 liter V8 engine
Oil Capacity With Oil Filter 7.5 liter (8 quarts)Without Oil Filter 7.0 liter (7.5 quarts)
6 qts of oil for a 4.7 liter and 5 qts of oil for a 5.9 liter
6 quarts with filter change
6 quarts 5w30
5 Qts. of motor oil ( 6 quarts with filter )
7
( 4.5 quarts of engine oil ) with oil filter change for the 3.0 liter V6 ( according to the 2003 Ford Ranger Owner Guide )
The 3.8 liter V6 engine in a 2003 Ford Mustang takes ( 5 quarts ) WITH ENGINE OIL FILTER CHANGE
6 probably
The 2003 Ford Excursion Owner Guide shows ( 6 quarts ) with engine oil filter change for the 5.4 liter V8 engine
According to the 2003 Lincoln Aviator Owner Guide , the 4.6 liter V8 takes ( 6 quarts ) with engine oil filter change
6 quarts