See also:

Department Of Transportation Uniform Tire Quality Grades
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 p ...

Ride Comfort And Vehicle Stability
Proper tire inflation contributes to a comfortable ride. Over-inflation produces a jarring and uncomfortable ride. ...

American Petroleum Institute (API) Engine Oil Identification Symbol
This symbol means that the oil has been certified by the American Petroleum Institute (API). The manufacturer only recommends API Certified engine oils. CAUTION! Do not use chemical flush ...