Mercury 1996 Sable Manual page 70

If the engine idle speed does not
slow down automatically, do not
allow your vehicle to idle for more
than 10 minutes. Have the vehicle
checked. Extended idling at high
engine speeds can produce very high
temperatures in the engine and
exhaust system, creating the risk of
fire or other damage to the vehicle
and may possibly result in personal
injury.
Do not park, idle, or operate your
vehicle in tall, dry grass, or other dry
ground areas. The high heat
generated by engine and emissions
components could start a ground fire.
If you consistently start your vehicle in subzero
temperatures, use an engine block heater (if
your vehicle has this option).
Engine Block Heater (If equipped)
(Standard in Canada)
Engine block heaters are strongly recommended
if you live in a region where temperatures reach
-10˚F (-23˚C) or below. An engine block heater
warms the engine coolant, which improves
starting, warms up the engine faster, and allows
the heater-defrost system to respond quickly.
To turn the heater on, simply plug it into a
grounded 110-volt outlet. Ford recommends that
you use a 110-volt circuit that is protected by a
ground fault circuit interrupter.
RWARNING
RWARNING
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