Chevrolet 1995 Astro Cargo Owner's Manual page 236

Windshield Washer Fluid
What to Use
When you need windshield washer fluid, be sure to read the manufacturer's
instructions before use. If you will be operating your vehicle in an area
where the temperature may fall below freezing, use a fluid that has
sufficient protection against freezing.
To Add
NOTICE:
0
When using concentrated washer fluid, follow the
manufacturer's instructions for adding water.
DonV mix water with ready-to-use washer fluid. Water can
cause the solution to freeze and damage your washer fluid
tank and other parts
of
the washer system. Also, water
doesn't clean
as
well
as
washer fluid.
Fill your washer fluid tank only 3/4 full when it's very cold.
This allows for expansion, which could damage the tank if it is
completely full.
Don't use radiator antifreeze in your windshield washer. It
can damage your washer system and paint.
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