Honda 1995 Civic Coupe Online Reference Owner's Manual page 166

Tire Information, Emissions Controls
Warning: The traction grade
assigned to this tire is based on
braking (straight ahead) traction
tests and does not include
cornering (turning) traction.
Temperature
The temperature grades are A
(the highest), B, and C,
representing the tire's resistance
to the generation of heat and its
ability to dissipate heat when
tested under controlled
conditions on a specified indoor
laboratory test wheel. Sustained
high temperature can cause the
material of the tire to degenerate
and reduce tire life, and
excessive temperature can lead
to sudden tire failure. The grade
C corresponds to a level of
performance which all passenger
car tires must meet under the
Federal Motor Vehicle Safety
Standard No. 109. Grades B and
Technical Information
A represent higher levels of
performance on the laboratory
test wheel than the minimum
required by law.
Warning: The temperature grade
for this tire is established for a
tire that is properly inflated and
not overloaded. Excessive speed,
underinflation, or excessive
loading, either separately or in
combination, can cause heat
buildup and possible tire failure.
Emissions Controls
The burning of gasoline in your
car's engine produces several by-
products. Some of these are
carbon monoxide (CO), oxides of
nitrogen (NOx), and
hydrocarbons (HC). Gasoline
evaporating from the tank also
produces hydrocarbons.
Controlling the production of CO,
NOx, and HC is important to the
environment. Under certain
conditions of sunlight and
climate, NOx and HC react to
form photochemical "smog."
Carbon monoxide does not
contribute to smog creation, but
it is a poisonous gas.
The Clean Air Act
The Clean Air Act* sets
standards for automobile
emissions. It also requires that
automobile manufacturers
explain to owners how their
emissions controls work and
what to do to maintain them.
This section summarizes how
the emissions controls work.
Scheduled maintenance is on
page 100 and 101.
* In Canada, Honda vehicles
comply with the Canadian Motor
Vehicle Safety Standards
(CMVSS) for Emissions valid at