Honda 1997 Civic Hatchback Owner's Manual page 76

Break-in Period, Gasoline
Break-in Period
Help assure your car's future
reliability and performance by paying
extra attention to how you drive
during the first 600 miles (1,000 km).
During this period:
Avoid full-throttle starts and rapid
acceleration.
Avoid hard braking. New brakes
need to be broken-in by moderate
use for the first 200 miles (300
km).
You should follow these same re-
commendations with an overhauled
or exchanged engine, or when the
brakes are relined.
Before Driving
Gasoline
Your Honda is designed to operate
on unleaded gasoline with a pump
octane number of 86 or higher. Use
of a lower octane gasoline can cause
a persistent, heavy metallic rapping
noise in the engine that can lead to
mechanical damage.
We recommend gasolines containing
detergent additives that help prevent
fuel system and engine deposits.
Using gasoline containing lead will
damage your car's emission controls.
This contributes to air pollution.
In Canada, some gasolines contain
an octane-enhancing additive called
MMT. If you use such gasolines,
your emission control system
performance may deteriorate and
the Malfunction Indicator Lamp on
your instrument panel may turn on.
If this happens, contact your
authorized Honda dealer for service.
Oxygenated Fuels
Some conventional gasolines are
being blended with alcohol or an
ether compound. These gasolines
are collectively referred to as
oxygenated fuels. To meet clean air
standards, some areas of the United
States and Canada use oxygenated
fuels to help reduce emissions.
If you use an oxygenated fuel, be
sure it is unleaded and meets the
minimum octane rating requirement.
Before using an oxygenated fuel, try
to confirm the fuel's contents. Some
states/provinces require this
information to be posted on the
pump.