Fuel and Refueling
If this action corrects the problem, the
Calculating Fuel Economy
warning lamp may not reset immediately.
It may take several driving cycles for the
warning lamp to turn off. A driving cycle
consists of an engine start-up (after four
or more hours with the engine off) followed
by city or highway driving.
Do not measure fuel economy during the
first 1000 miles (1600 kilometers) of
driving (this is your engine’s break-in
period); a more accurate measurement is
obtained after 2000 miles - 3000 miles
(3200 kilometers - 4800 kilometers). Also,
fuel expense, frequency of fill ups or fuel
gauge readings are not accurate ways to
measure fuel economy.
FUEL CONSUMPTION
Note: The amount of usable fuel in the
empty reserve varies and should not be
relied upon to increase driving range. When
refueling your vehicle after the fuel gauge
indicates empty, you might not be able to
refuel the full amount of the advertised
capacity of the fuel tank due to the empty
reserve still present in the tank.
1. Fill the fuel tank completely and record
the initial odometer reading.
2. Each time you fill the tank, record the
amount of fuel added.
3. After at least three to five tank fill ups,
fill the fuel tank and record the current
odometer reading.
Empty reserve is the amount of fuel
remaining in the tank after the fuel gauge
indicates empty. Do not rely on this fuel for
driving. The usable capacity of the fuel
tank is the amount of fuel that can be put
into the tank after the gauge indicates
empty. The advertised capacity is the total
fuel tank size – it is the combined usable
capacity plus the empty reserve.
4. Subtract your initial odometer reading
from the current odometer reading.
5. Calculate fuel economy by dividing
miles traveled by gallons used (For
Metric: Multiply liters used by 100, then
divide by kilometers traveled).
Keep a record for at least one month and
record the type of driving (city or highway).
This provides an accurate estimate of the
vehicle’s fuel economy under current
driving conditions. Additionally, keeping
records during summer and winter show
how temperature impacts fuel economy.
In general, lower temperatures mean lower
fuel economy.
Filling the Tank
For consistent results when filling the fuel
tank:
•
•
•
Turn the ignition off before fueling; an
inaccurate reading results if the engine
is left running.
Use the same fill rate
(low-medium-high) each time the tank
is filled.
EMISSION CONTROL SYSTEM
WARNINGS
Allow no more than two automatic
click-offs when filling.
Do not park, idle, or drive your vehicle
in dry grass or other dry ground cover.
The emission system heats up the
engine compartment and exhaust system,
which can start a fire.
Results are most accurate when the filling
method is consistent.
119
Fiesta (CCT), enUSA, Second Printing
English 
