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 shown on the sidewall of the tires on your vehicle.
All passenger car tires must conform to Federal safety requirements in addition to these grades.
See also:
Selection Of Engine Coolant
Use only the manufacturer’s recommended engine coolant (antifreeze). Refer to
“Fluids, Lubricants, and Genuine Parts” in “Maintaining Your Vehicle” for further
information.
CAUTION!
...
Traction Grades
The Traction grades, from highest to lowest, are AA, A, B, and C. These grades
represent the tire’s ability to stop on wet pavement, as measured under controlled
conditions on specified governme ...
Cooling System
WARNING!
You or others can be badly burned by hot engine
coolant (antifreeze) or steam from your radiator. If
you see or hear steam coming from under the hood,
do not open the hood until the r ...