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Things you might add to the outside of your vehicle can
affect the airflow around it. This may cause wind noise
and affect windshield washer performance. Check with
your Cadillac dealer before adding equipment to the
outside of your vehicle.
Use premium unleaded gasoline rated at 9 1 octane or
higher. At a minimum, it should meet specifications
ASTM D4814 in the United States and CGSB 3.5-WI93
in Canada. Improved gasoline specifications have been
developed by the American Automobile Manufacturers
Association (AAMA) for better vehicle performance
and engine protection. Cholines meeting the 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 9 I . If
the octane is less than 91, you may get a heavy knockmg
noise when you drive. (In an emergency, you may be
able
to use a lower
octane
--
as low as 87
--
if heavy
knocking does not occur.) If you're using 91 or higher
octane unleaded gasoline
and you
hear heavy knocking,
your engine needs service.
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 Cadillac 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.
Some gasolines that are not reformulated for low
emissions contain an octane-enhancing additive called
rnethylcyclopentadienyl manganese tricarbonyi (MMT);
ask your service station operator whether or not his fuel
contains MMT. General Motors
does
not recommend the
use of such gasolines. If fuels containing MMT are used,
spark plug life may be reduced and your emission
controa system performance may be affected. The
malfunction indicator lamp on your instrument panel
may turn on. If this occurs, return to your authorized
Cadililac dealer fox service.
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