Treadwear

The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 would wear one and one-half (11⁄2) times as well on the government course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm due to variations in driving habits, service practices, and differences in road characteristics and climate.
See also:
Second generation (2003–2006)
The Navigator was updated in 2003, along with the Ford Expedition, on the new
Ford U platform. The interior was also substantially revised to bring it up to
the level expected by luxury buyers. So ...
Obtaining a French Owner’s Guide
French Owner’s Guides can be obtained from your authorized dealer or
by contacting Helm, Incorporated using the contact information listed
previously in this section. ...
Windows and wiper blades
The windshield, rear and side windows and the wiper blades should be
cleaned regularly. If the wipers do not wipe properly, substances on the
vehicle’s glass or the wiper blades may be the cause. ...
