According to the ( 2003 ) Ford Windstar Owner Guide :
With engine oil filter change :
The 3.8 liter V6 engine takes ( 5.0 U.S. quarts of 5W-20 )
5 quarts (just had my 2012 Ford Fusion SE serviced).
Change the filter at the same time and you will need 5 quarts.
V6 ENGINE 5.0 Quarts V8 ENGINE 6.0 Quarts
5 quarts with engine oil filter change
it needs approximately 16 quarts?
5 quarts of oil. ( with filter change )
( 5 quarts ) with engine oil filter change
( 5 quarts ) WITH ENGINE OIL FILTER CHANGE
The blower on the back heater may need to be replaced on the 2000 Ford Winstar.
The 2008 Ford E-250 owners manual shows ( 6 quarts ) with filter change
The Ford 4.0 liter V6 engine takes ( 5 quarts with engine oil filter change )
With engine oil filter change ( 5 quarts ) according to the Owner Guide