See also:

Department Of Transportation Uniform TireQuality 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 show ...

If Your Engine Overheats
In any of the following situations, you can reduce the potential for overheating by taking the appropriate action. • On the highways — slow down. • In city traffic — while stopped, place the trans ...

Spark plugs
The cleanness and soundness of the spark plugs are very important for keeping the engine efficient and polluting emissions down. The appearance of the spark plug, if examined by an expert eyes, is ...