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Page 174 of 631

FORD F-250 2020  Owners Manual Cold Weather Starting (Flexible
Fuel Vehicles Only)
The starting characteristics of all grades
of E85 ethanol make it unsuitable for use
when ambient temperatures fall below
0°F (-18°C).  Consult yo

Page 176 of 631

FORD F-250 2020  Owners Manual Automatic Engine Shutdown
If your vehicle is equipped with a keyless
ignition, it has a feature that automatically
shuts down the engine if it has been idling
for an extended period. The ignition also

Page 177 of 631

FORD F-250 2020  Owners Manual Your vehicle has a fuel and water separator
that recirculates fuel from the engine to
help prevent fuel filter clogging. To avoid
engine fuel starvation during cold weather
operation of 32°F (0°C) o

Page 178 of 631

FORD F-250 2020  Owners Manual We recommend the following cold
weather idling guidelines:
•
You can use Motorcraft® cetane
improvers or non-alcohol-based
cetane improvers from a reputable
manufacturer as needed.
• Maintain the

Page 179 of 631

FORD F-250 2020  Owners Manual Operation in Standing Water
Ingestion of water into the diesel engine
can result in immediate and severe
damage to the engine. If driving through
water, slow down to avoid splashing water
into the int

Page 180 of 631

FORD F-250 2020  Owners Manual Note:
The heater is most effective when
outdoor temperatures are below 0°F
(-18°C).
For cold climates that are below 
0°F
(-18°C) needing a temporary battery
installation. Order the cold climate p

Page 187 of 631

FORD F-250 2020  Owners Manual WARNING: Stop refueling after the
fuel pump nozzle automatically shuts
off for the second time. Failure to follow
this will fill the expansion space in the
fuel tank and could lead to fuel
overflowing

Page 188 of 631

FORD F-250 2020  Owners Manual WARNING: Do not remove the fuel
pump nozzle from its fully inserted
position when refueling. WARNING: When refueling always
shut the engine off and never allow
sparks or open flames near the fuel tank