According to the 2001 Ford Mustang Owner Guide :
With engine oil filter change :
The 3.8 liter V6 engine and the 4.6 liter V8 engine take :
( 5.0 U.S. quarts of 5W-20 )
The 2001 Ford Mustang owners manual shows ( 5 quarts ) of engine oil with filter change
5-6qrts mercon v engine must be on check all your levels.
2quarts
2.5 quarts of transmission fluid (type F, not FA).
3.4 quarts
I believe that is ( 4.5 quarts with filter change )
A 2001 VW Jetta 2.0 requires 4.2 quarts of engine oil.
approx.4.5 quarts of oil with the filter.
4 cylinder 5 quarts 6 cylinder 6 quarts
The 1999 Ford Mustang 3.8 liter V6 engine takes : ( 5 quarts with engine oil filter change )
In a 2005 Ford Mustang : With engine oil filter change : The 4.0 liter SOHC , V6 engine takes : ( 5.0 U.S. quarts of 5W-30 )
I have a 2001 2.7 L Intrepid and it takes 4.5 quarts