Uniform Tire Quality Grading Standards
See also:
Problems with the transmission
...
Tire ply composition and material
used
Describes the number of plies or the number
of layers of rubber-coated fabric in the tire
tread and sidewall. These are made of steel,
nylon, polyester and other materials. ...
Additives
Do not use any additives in the engine oil.
This could damage the engine. ...
