See also:

Oils, Fluids and Flushing
In many cases, fluid discoloration is a normal operating characteristic and, by itself, does not necessarily indicate a concern or that the fluid needs to be changed. However, discolored fluids th ...

Special operating conditions
If you operate your vehicle primarily in any of the following conditions, you need to perform additional maintenance as indicated. If you occasionally operate your vehicle under any of these con ...

First generation (1998–2002)
The 1998 Navigator introduced the concept of the American luxury SUV, competing at first with only the Land Rover Range Rover. It was trimmed with leather, wood, and fine carpeting, but its humble ...