Chevrolet 1994 Astro Bedienungshandbuch Seite 221

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Seitenansicht 220
NOTICE:
If
you try
to
do your own service work without knowing enough
about it, your vehicle could be damaged.
The 8th digit
of
your Vehicle Identification Number (VTN) shows the code
letter for your engine. You will find the VIN at the top left
of
your
instrument panel. (See “Vehicle Identification Number”
in
the Index.)
Use regular unleaded gasoline rated at
87
octane or higher. With the
4.3L (Code
W)
engine,
use
premium unleaded gasoline rated at
9
1
octane or
higher for high power performance, when towing a trailer or with a high
payload requirement. But when operating with a light load as a normal
condition, you may
use middle grade or regular unleaded gasolines.
The gasoline
you
use should meet specifications ASTM D48 14
in
the
U.S.
and CGSB 3.5-92 in Canada. These
fuels
should have the proper additives,
so
you
should not have
to
add anything
to
the fuel.
In the U.S. and Canada, it’s easy to be sure
you
get the right kind of
gasoline (unleaded). You’ll see “UNLEADED” right
on
the
pump. And only
unleaded nozzles will fit into your vehicle’s filler neck.
Be sure the posted octane is at least
91
for premium,
89
for middle grade
and
87
for regular. If the octane is less than
87,
you may get a heavy
knocking noise when you drive. If it’s bad enough, it can damage your
engine.
If
you’re using
fuel
rated at 91 octane or higher and
you
still hear heavy
knocking, your engine needs service. But don’t worry if
you
hear a little
pinging noise when you’re accelerating or driving up a hill. That’s normal,
and you don’t have
to
buy a higher octane fuel to get rid
of
it. It’s
the
heavy,
constant knock that means
you
have a problem.
What about gasoline with blending materials that contain oxygen
(oxygenates), such as MTBE or alcohol?
MTBE
is “methyl tertiary-butyl ether.” Fuel that is no more than
15%
MTBE
is
fine
for your vehicle.
6-3
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