Ford 1996 Bronco Manual page 294

5. Stand away from the radiator opening. Hot
steam may blow out or hot engine coolant
may even splash out.
Freezing Protection
The factory-installed solution of Ford Premium
Cooling System Fluid and water will protect
your vehicle to
protection rating of the engine coolant at least
once a year, just before winter.
Add engine coolant only to the recovery
reservoir. If the coolant level is low, add to the
reservoir a 50/50 mixture of water and the type
of engine coolant that Ford specifies. You may
add water by itself only in an emergency, but
you should replace it with a 50/50 mixture as
soon as possible.
Ford Premium Cooling System Fluid is an
optimized formula that will protect all metals
and rubber elastomers used in Ford engines for
four years or 50,000 miles (80,000 km). It is not
necessary and not recommended to use
supplemental coolant additives in your gasoline
powered vehicle. These additives may harm
your engine cooling system. Follow the
recommended service interval for changing your
engine coolant.
NOTE: When you change or add engine
coolant, it is important to maintain
your engine coolant concentration
between 40% (-11˚F [-24˚C]) and 60%
(-62˚F [-52˚C]), depending on your local
climate conditions. Below 40% you will
lose freeze protection and above 60%
your engine may overheat on a warm
day.
35˚F ( 37˚C). Check the freeze
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