Breaking-in your vehicle
Your vehicle does not need an extensive break-in. Try not to drive continuously at the same speed for the first 1,000 miles (1,600 km) of new vehicle operation. Vary your speed frequently in order to give the moving parts a chance to break in.
Do not add friction modifier compounds or special break-in oils since these additives may prevent piston ring seating. See Engine oil in the Maintenance and Specifications chapter for more information on oil usage.
See also:
Washing the exterior
Wash your vehicle regularly with cool or lukewarm water and a neutral
pH shampoo, such as Motorcraft Detail Wash (ZC-3-A), which is
available from your authorized dealer.
• Never use strong hou ...
First generation (1998–2002)
The 1998 Navigator introduced the concept of the American luxury SUV,
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Traction AA A B C
The traction grades, from highest to lowest are AA, A, B, and C. The
grades represent the tire’s ability to stop on wet pavement as measured
under controlled conditions on specified government tes ...