Ford Grand Marquis Owner's Manual page 219

Do not use alcohol or methanol antifreeze or any
engine coolants mixed with alcohol or methanol
antifreeze. Do not use supplemental coolant
additives in your vehicle. These additives may
harm your engine cooling system. The use of an
improper coolant may void the warranty of your
vehicle's engine cooling system.
Recycled engine coolant
Ford Motor Company recommends that Ford
and Lincoln-Mercury dealers use recycled engine
coolant produced by Ford-approved processes.
Not all coolant recycling processes produce
coolant which meets Ford specification
ESE-M97B44-A, and use of such coolant may
harm engine and cooling system components.
Always dispose of used automotive fluids in a
responsible manner. Follow your community's
regulations and standards for recycling and
disposing of automotive fluids.
Coolant refill capacity
To find out how much fluid your vehicle's
cooling system can hold, refer to Refill capacities
in the Capacities and specifications chapter.
Have your dealer check the engine cooling
system for leaks if you have to add more than a
quart (liter) of engine coolant per month.
Severe winter climate
If you drive in extremely cold climates (less than
-34˚F [-36˚C]), it may be necessary to increase
the coolant concentration above 50%. Refer to
the chart on the coolant container to ensure the
coolant concentration in your vehicle is such that
the coolant will not freeze at the temperature
level in which you drive during winter months.
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