For the manual, it used a T-5. For auto, I'm not too sure. Sorry.
Mercon III
Type F Automatic Transmission Fluid.
look in the manual
Motorcraft MERCON automatic transmission fluid for your manual transmission
Motorcraft MERCON ATF ( automatic transmission fluid ) according to the owners manual
Your 2000 Ford Mustang with an automatic transmission typically requires Mercon V transmission fluid. It's important to check your owner's manual for specific recommendations and to ensure you use the correct fluid type for optimal performance. Additionally, using the right fluid helps maintain the longevity of your transmission.
Motorcraft MERCON automatic transmission fluid in the manual transmissions on a 2004 Ford Mustang ( according to the Owner Guide )
Mercon V
There are a number of vehicles that use the T5 Transmission such as AMC Sprint, Ford Mustang, Mustang SVO, Mercury Capri, Ford Falcon, GMC Safari, TRV Tuscan and the TRC T350.
Use Motorcraft ATF
The 2001 Ford Mustang runs on regular unleaded.
The 2003 Ford Mustang runs on regular unleaded.