According to the 1998 Ford Windstar owner Guide :
For the 3.8 liter V6 ( and the 3.0 )
With engine oil filter change
( 4.3 litres / 4.5 U.S. quarts of 5W-30 engine oil )
5 qts. to 6 qts. Max.
It should be the 6.8 liter engine and the capacity is 6 quarts
6 quarts ( 5.7 liters ) WITH FILTER CHANGE
In a 1998 Ford Windstar : There were 2 engine sizes offered from the factory : A 3.0 liter V6 engine and the 3.8 liter V6 engine
( 5 ) quarts / 4.7 liters , with engine oil filter change
6 quarts ( 5.7 liters ) with engine oil filter change
yes
5 quarts / 4.7 liters / with engine oil filter change
According to the 1998 Ford E-150 Owner Guide : With engine oil filter change : The 4.6 liter V8 engine takes ( 5.7 liters / 6.0 U.S. quarts of 5W-30 )
According to the 1998 Ford F-250 Light Duty Owner Guide : The engine cooling system capacity for the 4.6 liter V8 is : Without air conditioning ( 17.9 U.S. quarts ) With A/C ( 19.4 quarts ) * also , it came from the factory with a 50 / 50 mix of distilled water and GREEN color antifreeze ( meeting Ford specification ESE-M97B44-A )
5 quarts
6 quarts