Lincoln Navigator (1999) — essential Tips for Fuel System Maintenance and Economy [180/216]

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The fuel system may be under pressure. If the fuel filler cap is

venting vapor or if you hear a hissing sound, wait until it stops

before completely removing the fuel filler cap. Otherwise, fuel may

spray out and injure you or others.

If you do not use the proper fuel filler cap, the pressure in the

fuel tank can damage the fuel system or cause it to work

improperly in a collision.

Fuel Filter

Your vehicle is equipped with a fuel filter that is mounted on the

underbody.

For fuel filter replacement, see your dealer or a qualified service

technician. Refer to the Scheduled Maintenance Guide for the

appropriate intervals for changing the fuel filter.

If you replace the fuel filter, replace it with an authorized

Motorcraft part. The customer warranty may be void for any

damage to the fuel system if an authorized Motorcraft fuel filter

is not used.

ESSENTIALS OF GOOD FUEL ECONOMY

Measuring techniques

Your best source of information about actual fuel economy is you, the

driver. You must gather information as accurately and consistently as

possible. Fuel expense, frequency of fillups or fuel gauge readings are

NOT accurate as a measure of fuel economy. We do not recommend

taking fuel economy measurements during the first 1 600 km (1 000

miles) of driving (engine break-in period). You will get a more accurate

measurement after 3 000 km–5 000 km (2 000 miles-3 000 miles).

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.

Maintenance and care

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