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• Do not overfill the DEF tank.
• Avoid spilling DEF on painted surfaces, carpeting or plastic
components. Immediately wipe away any DEF that has spilled on
painted surfaces with a damp cloth and water. If it has already
crystallized, use warm water and a sponge.
• DEF will freeze below 12°F (-11°C). Your vehicle is equipped with an
automatic pre-heating system which allows the DEF system to operate
below 12°F (-11°C).
• Do not store DEF bottle in vehicle. If it leaks it could cause damage to
interior components or release ammonia odor inside the vehicle.
• Store DEF fluid out of direct sunlight and in temperatures between
23°F (-5°C) – 68°F (20°C).
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.
Essentials of good fuel economy
Measuring techniques
Your best source of information about actual fuel economy is you, the
driver. You must gather information as accurately and consistently as
possible. Fuel expense, frequency of fill-ups or fuel gauge readings are
NOT accurate as a measure of fuel economy. We do not recommend
taking fuel economy measurements during the first 1,000 miles
(1,600 km) of driving (engine break-in period). You will get a more
accurate measurement after 2,000–3,000 miles (3,000–5,000 km).
2011 F-650/750 (f67)
Supplement, 2nd Printing
USA (fus)
Maintenance and Specifications
207
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