Ford Probe Owner's Manual page 223

Use Ford Premium Cooling System Fluid or an
equivalent engine coolant that meets Ford
Specification ESE-M97B44-A. Do not use alcohol
or methanol antifreeze and do not use engine
coolant mixed with alcohol or methanol
antifreeze. If you do not use the proper coolant,
the aluminum radiator on your vehicle will
corrode.
Leave the engine coolant in all year. Make sure
that the coolant will not freeze at the
temperature level in which you drive during
winter months. Keep an engine coolant in your
engine that has a protection rating of at least
-20˚F (-29˚C), or whatever protection rating is
appropriate for the climate in which you live.
To find out how much engine coolant mixture
your vehicle's coolant system can hold, see Refill
capacities for fluids in the Index.
You may add water by itself only in an
emergency, but you should replace it with a
50/50 mixture as soon as possible.
Have your dealer check the engine cooling
system for leaks if you have to add a quart
(liter) of engine coolant more than once a month.
Engine coolant drain and flush
The proper procedures to completely drain and
flush the engine cooling system can be found in
the Service Manual for your vehicle or you can
see your dealer. See the order form located
before this chapter. Follow these recommended
procedures to ensure that your vehicle has the
specified engine level and 50/50 mixture of
cooling system fluid and water.
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