According to the 2004 Ford Mustang Owner Guide ( 5W-20 )
With engine oil filter change :
The V6 engine(s) take ( 5.0 U.S. quarts of 5W-20 )
The 4.6 liter V8 engine takes ( 6.0 quarts of 5W-20 )
The 2004 Ford Mustang runs on regular unleaded.
Most any synthetic oil can be used. A lot of people who own this vehicle rely on Mobile 1 to use in their Mustang.
What type of oil does a 1997 Ford Mustang 3.8 V6 use?
The owners manual shows ( 5 W 20 ) for the V6 and V8 engines
5W-20 , according to the 2003 Ford Mustang Owner Guide
10w30
A 1995 Ford Mustang GT came from the factory with ( 5W-30 )
My ( 1991 ) Ford Mustang 5.0 LX came from the factory with ( 5W-30 )
Motorcraft MERCON automatic transmission fluid in the manual transmissions on a 2004 Ford Mustang ( according to the Owner Guide )
5 qt 5W-30
The grade of oil needed for a 2004 Ford BA XR8 is 5W-20.
The 2003 Ford Mustang Owner Guide shows ( 5W-20 )