Ford Mustang Owner's Manual page 216

Maintenance and Specifications
Fluid Ford Part
Name
Engine Motorcraft
1
coolant Premium
Gold Engine
Coolant
(yellow-
colored)
Power Motorcraft
steering fluid MERCON
ATF
Rear axle Motorcraft
2
lubricant SAE 80W-90
Premium
Rear Axle
Lubricant
Motorcraft
SAE 75W-140
Synthetic
Rear Axle
Lubricant
Fuel tank N/A
216
2004 Mustang (mus)
Owners Guide (post-2002-fmt)
USA English (fus)
Application Capacity
OHV V6 11.2L
engine (11.8 quarts)
4.6L SOHC 13.3L
V8 engine (14.1 quarts)
4.6L 4v V8 15.2L
(Mach 1) (16.1 quarts)
with
Automatic
Transmission
4.6L 4v V8 15.2L
(Mach 1) (16.1 quarts)
with Manual
Transmission
OHV V6 Keep in
engine FULL HOT
range on
dipstick
4.6L SOHC Fill to
V8/4.6L 4v V8 between MIN
(Mach 1) and MAX
engine lines on
reservoir
7 .5 inch axle 1.5L
(3.25 pints)
8.8 inch axle 2.0L
(4.25 pints)
All 59.4L
(15.7 gallons)