Filling the tank

Filling the tank  - Essentials of good fuel economy - Maintenance and Specifications - Lincoln MKZ Owners Manual - Lincoln MKZ

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 Maintenance product specifications and capacities section of this chapter.

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 fuel remaining in the fuel tank after the fuel gauge indicates empty.

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.

For consistent results when filling the fuel tank:
Turn the engine/ignition switch off prior to refueling, an error in the reading will result if the engine is left running.
Use the same filling rate setting (low medium high) each time the tank is filled.
Allow no more than two automatic click-offs when filling.
Always use fuel with the recommended octane rating.
Use a known quality gasoline, preferably a national brand.
Have the vehicle loading and distribution the same every time.
Your results will be most accurate if your filling method is consistent.

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