See also:

Department Of Transportation Uniform Tire Quality Grades
The following tire grading categories were established by the National Highway Traffic Safety Administration. The specific grade rating assigned by the tire’s manufacturer in each category is ...

Tire Markings
1 — U.S. DOT Safety Standards Code (TIN) 2 — Size Designation 3 — Service Description 4 — Maximum Load 5 — Maximum Pressure 6 — Treadwear, Traction and Temperature Grades NOTE: †...

Exhaust System
The best protection against carbon monoxide entry into the vehicle body is a properly maintained engine exhaust system. If you notice a change in the sound of the exhaust system; or if the exha ...