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Be sure the posted octane is at least 91. If the octane is
less than 91, you may get a heavy knocking noise when
you drive. (In an emergency, you may be able to use
lower octane
--
as low as 87 -- if heavy knocking does
not occur.)
If
you're using 91 or higher octane unleaded
gas and you still get heavy knocking, your engine needs
service.
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.
Ethanol is ethyl or grain alcohol. Properly-blended fuel
that is no more than 10% ethanol is fine for your
vehicle.
i Wethanol is methyl or wood alcohol.
NOTICE:
Fuel that is more than
5 %
methanol is bad for
your vehicle. 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. And even at
5 %
or
less, there must be "cosolvents" and corrosion
preventers in this fuel to help avoid these
problems.
6-3
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