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 (1 1/2) times as well on the government course as a tire graded 100. The relative performance of tires depends upon 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:
Most common factors contributing to vehicle corrosion
● The accumulation of moisture-retaining dirt and debris in body panel sections, cavities, and other areas.
● Damage to paint and other protective coatings caused by gravel and stone ch ...
Fuel-filler door
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Wheels
Wash the wheels when washing the vehicle to maintain their appearance.
• Clean the inner side of the wheels when the wheel is changed or the underside of the vehicle is washed.
• Inspect wheel rims ...