Ford F-650 2001 Owner's Manual page 141

Driving
Driving through deep water where the transmission vent tube is
submerged may allow water into the transmission and cause
internal transmission damage.
FUEL CONSUMPTION IMPROVEMENT MEASURES
There are two important factors you can control to improve fuel
economy: the mechanical condition of your vehicle and how you drive it.
A properly maintained vehicle will deliver better performance than a
neglected vehicle. Always follow your maintenance schedule to keep your
vehicle in top operating condition.
Also, your driving habits have a significant influence on use of fuel. By
following these suggestions, you can stretch your fuel use:
• Avoid changes in speed as much as possible.
• Anticipate changing traffic conditions. Sudden stops and fast
acceleration waste fuel.
• Avoid extensive idling.
• Do not drive with your foot resting on the brake pedal.
WINTER FRONTS
If using an aftermarket winter front (not recommended), it must have a
permanent opening directly in line with the center of the fan drive. The
minimum opening size must be at least 774 square cm (120 square inches).
The use of an aftermarket winter front or other air flow restriction
device mounted in front of the radiator is not recommended on vehicles
equipped with chassis mounted air-to-air aftercooling. Air flow restriction
will cause high exhaust temperatures, power loss, excessive fan usage
and a reduction in fuel economy.
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