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 emission control
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
methylcyclopentadienyl manganese tricarbonyl
(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
control system performance may be affected. The
malfunction indicator lamp
on
your instrument panel
may
turn
on.
If
this occurs, return
to
your authorized
Cadillac dealer for service.
To
provide cleaner air, all gasolines in the United States
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.
6-4
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