fuel reserve Mercury Sable 1999 Owner's Manuals

Fuel gauge
Displays approximately
how much fuel is in
the fuel tank (when
the key is in the ON
position). The fuel
gauge may vary slightly
when the vehicle is in
motion. The ignition
should be in the OFF
position while the vehicle is being refueled. When
the gauge first indicates empty, there is a small
amount of reserve fuel in the tank. When refueling
the vehicle from empty indication, the amount of
fuel that can be added will be less than the
advertised capacity due to the reserve fuel.
A minimum of six gallons must be added or removed
from the fuel tank in order for the gauge to
instantaneously update. If less than six gallons is the
change, the gauge will take between five to ten
minutes to update.
EF
Instrumentation
15

The advertised fuel capacity of the fuel tank on your
vehicle is equal to the rated refill capacity of the fuel
tank as listed in the Refill Capacities chart in this
ªOwner Guide.º The advertised capacity is the
amount of the Indicated Capacity and the Empty
Reserve combined. Indicated Capacity is the
difference in the amount of fuel in a full tank and a
tank when the fuel gauge indicates empty. Empty
Reserve is the small amount of usable fuel remaining
in the fuel tank after the fuel gauge indicates empty.
The amount of 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.
Filling the tank
For consistent results:
²Use the same filling rate setting (low Ð medium
Ð high) each time the tank is filled.
²Allow three automatic click-offs when filling.
²Always use the recommended octane rating of a
known quality gasoline, preferably a national
brand.
²Use the same side of the same pump and have
the vehicle facing the same direction each time
you fill up.
²Have the vehicle loading and distribution the
same every time.
Your results will be most accurate if your filling
method is consistent.
Calculating fuel economy
1. Fill the fuel tank completely and record the initial
odometer reading.
Maintenance and care
163