Fuel
The 8th digit of your vehicle identification number
(VIN) 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.)
If you don’t have the 3800 Supercharged engine (VIN
Code l), use regular unleaded gasoline rated at 87 octane
or higher.
If you have the 3800 Supercharged engine, use premium
unleaded gasoline rated at 91 octane or higher.
At a minimum, the gasoline you use should meet
specifications ASTM D4814 in the United States and
CGSB 3.5-M93 in Canada. Improved gasoline
specifications have- been developed by the American
Automobile Manufacturers Association (AAMA) for
’ better vehicle performance and engine protection.
Gasolines meeting ihe AAMA specification could
, ’ provide improved driveability and emission control
system protection compared to other gasolines.
Be sure the posted octane for premium is at least 91
(at least 89 for middle grade and
87 for regular). If the
i 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 have the 3800 Supercharged engine, in an
emergency, you may be able to use .a lower octane
-- as
low as 87
-- if heavy knocking does not occur. If you
are using 91 or higher octane unleaded gasoline and you
still heq heavy knocking, your engine needs service.
,
If you’re using fuel rated at the recommended 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 pinging. It’s the heavy, constant
knock that means you have a problem.
If your vehicle is certified to meet California Emission
Standards (indicated on the underhood tune-up label), it
is designed to operate’on fuels that meet California
specifications. If such fuels are not available in states
adopting California emissions standards, your vehicle
will operate satisfactorily on fuels meeting federal
specifications, but emission control system performance
may be affected. The malfunction indicator lamp on
your instrument panel may turn on and/or your vehicle
may fail a smog-check test.
If this occurs, return to your
authorized Buick dealer for diagnosis to determine,the
cause of failure.
In the event it is determined that the
cause of the condition is the type of
fuels used, repairs
may not be covered by your warranty.
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In Canada, some gasolines contain an octane-enhancing
additive called
MMT. If you use such fuels, your
emission control system performance may deteriorate
and the malfunction indicator lamp on your instrument
panel may turn on. If this happens, return to your
authorized Buick dealer for service.
To provide cleaner air, all gasolines are now required to
contain additives that will help prevent deposits from
forming in your engine and fuel system, allowing your
emission control system to function properly. Therefore,
you should not have to add anything to the fuel. In
addition, gasolines containing oxygenates, such as ethers
and ethanol, and reformulated gasolines may be
available in your area to help clean the air. General
Motors recommends that
you use these gasolines if they
comply with the specifications described earlier.
I NOTICE:
Your vehicle was not designed for fuel that
contains methanol. Don’t use it. It can corrode
metal parts in your fuel system and also damage
plastic and rubber parts. That damage wouldn’t be covered under your warranty.
If you plan on driving in another country outside the
United States or Canada, the proper fuel may be hard to
find. Never use leaded gasoline or any other fuel not
recommended in the previous text
on fuel. Costly repairs
caused by use
of improper fuel wouldn’t be covered by
your warranty.
To check on fuel availability, ask an auto club, or
contact a major oil company that does business in the
country where you’ll be driving.
You can also write us at the following address for
advice. Just tell
us where you’re going and give your
Vehicle Identification Number (VIN).
General Motors Overseas Distribution Corporation
North American Export Sales
(NAES)
1908 Colonel Sam Drive
Oshawa, Ontario
L1H 8P7
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