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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