Cadillac 1995 sedan deville Owner's Manual page 251

H o w
to
Add Coolant
to
the Coolant Recovery Tank
If you haven't found
a
problem yet, but the coolant level isn't
at
or near
the FULL COLD mark on the &ant recovery tank, add a 50/50 mixture
of clenu
water (preferably distilled) and a proper antifreeze at the coolant
recovery tank. (See "Engine Coolant" in the Index for more information
about the proper coolant
mix.)
NOTICE:
In cold weather, water can freeze and crack the engine, radiator,
heater core and other parts. Use the recommended coolant.
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