Filling The Tank; Calculating Fuel Economy - Mercury Sable 1999 Owner's Manual

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
"Owner Guide." 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:
Use the same filling rate setting (low — medium
— high) each time the tank is filled.
Allow three automatic click-offs when filling.
Always use the recommended octane rating of a
known quality gasoline, preferably a national
brand.
Use the same side of the same pump and have
the vehicle facing the same direction each time
you fill up.
Have 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