Ford Grand Marquis Owner's Manual page 39

INST ECON — Instantaneous Fuel
Economy
Select this function to calculate your
instantaneous fuel economy. Your instantaneous
fuel economy is the fuel economy you get at any
particular moment. For example, you can see
what your fuel economy is in heavy traffic or on
an open highway.
Your vehicle must be moving to calculate fuel
economy. When your vehicle is not moving,
instantaneous fuel economy is displayed at 0
miles per gallon or 99 liters per 100 kilometers.
When you are moving, the display may read
anything between 0 and 99 miles/gallon (1 to 99
L/km). Instantaneous fuel economy cannot be
reset.
TRIP A and TRIP B — Elapsed Distance
Traveled
These two functions of the message center allow
you to see how far you have traveled since you
last reset. Trip A and Trip B are completely
independent and must be reset individually.
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