Ford 1998 Mustang Owner's Manual page 134

Maintenance and care
3.8L OHV V6 engine
4.6L SOHC V8
engine
1. Clean the reservoir cap before removal to prevent
dirt or water from entering the reservoir.
2. Visually inspect the
fluid level.
3. If necessary, add
brake fluid until the
level reaches MAX. Do
not fill above this line.
4. Use only a DOT 3 brake fluid certified to meet
Ford specifications. Refer to Lubricant
specifications in the Capacities and specifications
chapter.
Brake fluid is toxic.
134