Ford 1996 Contour Manual page 217

The windshield washer fluid reservoir
Adding washer fluid
Do not put windshield washer fluid in the container for
the engine coolant.
If sprayed to clean the glass, engine coolant or antifreeze could
make it difficult to see through the windshield.
Use specially formulated windshield washer fluid rather than
plain water, because specially formulated washer fluids contain
additives that dissolve road grime. For safety reasons, washer
fluids containing an appropriate antifreeze such as methanol
should be used in freezing weather (temperatures below 32˚F
[0˚C]). State or local regulations on Volatile Organic Compounds
(VOC's) may restrict use of the most common antifreeze,
methanol. Washer fluids containing non-methanol antifreeze
agents should be used only if they provide cold weather
protection without damaging the vehicle's paint finish, wiper
blades, and windshield washer system.
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