Federa1 regulations require that pumps delivering unleaded gasoline be labeled
with the word UNLEADED. Only these pumps have nozzles which fit the filler
neck
of
your vehicle gasoline tank.
In-the United States, Federal law also requires that gasoline octane ratings
be
posted on the pumps. The octane rating shown-is an average
of
Research
octa!1e
(R) and Motor octane(M).
In
most parts
of
the United States, you should use
unleaded gasoline with an octane rating
of
at
least
87.
However, you may use
unleaded
gaSOline
with
an
octane rating as low as
85
in
thes:e
high-altitude areas:
Colorado, Montana, New Mexico, Utah. Wyoming. northeastern Nevada.
southern Idaho, western South Dakota, and that part
of
Texas which
is
directly
south
of
New Mexico.
Using unleaded gasoline with an octane rating lower _than staled above can cause
persistent, heavy "spark knock." (''Spark knock"
is
a metallic rapping noise.) This
can
lead to engine damage.
If
you detect heavy spark knock even when using
gasoline
of
the stated octane rating,
or
if you hear steady spark knock while
holding a steady speed on level roads, have your dealer correct the problem.
However. now and then you may
notice
light spark knock for a short time while
accelerating or driving up hills. This is no cause for concern, because you get the
greatest
fuel
economy benefit from the gasoline's octane rating when there
is
occasional light spark
knock
~
Using gasoline with a higher octane rating than that
which allows occasional spark knock
is
an unneceSsary expense.
Gasohol
Gasohol, a mixture
of
unleaded gasoline and ethanol (grain alcohol),
is
available in some areas. You may use gasohol in
your
vehicle, provided it
is
no
more
than
10% ethanol. '
Be
:sure
the
gasohol has
the
same
octane
ratings as
stated
above for unleaded gasoline.
If
drivability problems are
encountered
because _
of
the
use
of
gasohol,
you
should switch back
to
unleaded gasoline.
NOTICE
:
Take
care
to
not
spill
gasohol
on
painted
surfaces
. Gasohol
can
cause
paint
damage,
which
may
not
be
covered
under
the
New
Vehicle
Warranty.
OPERATION
IN
FOREIGN
COUNTRIES
Your
engin~
is
designed to run on unleaded gasoline with the octane ratings given
under '''Fuel Requirements" above.
If
you plan to drive your vehicle outside the United States and its jurisdictions
or
Canada, there
is
a chance the gasolines available
in
some count,ries
will
not meet
the needs
of
your engine. Low octane rated gasolines may cause engine knocking
or
serious engine damage,: for which Chevrolet
is
not responsible.
Using leaded gasoline
in
-a vehicle equipped with a catalytic converter may cause
the converter to lose its effectiveness as an emission control.
It
could also affect
the emission warranty.
If
you must use leaded gasoline
in
a vehicle designed for
unleaded fuel, converter modification and different maintenance intervals
will
be
required.
For
gasoline information and a maintenance schedule for the countries
in
which you plan to travel, write to: Chevrolet Motor Division, Consumer
Relations Department, Detroit, Michigan 48202, (in Canada, write to General
Motors
of
Canada Limited. Customer Service Department, Oshawa, Ontario
LlJ
5Z6).
When writing, please include:
• the Vehicle Identification Number and
• the countries in which you plan to travel.
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