Standard anti-freeze.
Used coolant should be properly recycled.
dex-cool coolant is used in most 3.1 engines,
The factory coolant is a red, five year, HOAT type coolant.
R134a
Best thing to do is but the universal coolant, it can be used in all vehicles.
the red coolant. the pink coolant is used for newer model.
Dex-Cool
Most 2000 GM cars were filled with the RED Dexcool coolant. Using the standard green fluid after the Dexcool has been used can lead to clogged coolant passages and destroy the engine.
According to the 1998 Ford Taurus Owner Guide ( 5W-30 )
dex-cool coolant---it is orange in color.
Water
Water