fuel additives CADILLAC SEVILLE 1993 4.G Owners Manual

Downloaded from www.Manualslib.com manuals search engine A CAUTION:
You can be injured if you try to do service work on a vehicle
without knowing enough about it.
Be sure you have sufficient knowledge, experience, and the
proper replacement parts and tools before
you attempt any
vehicle maintenance task.
Be sure to use the proper nuts, bolts and other fasteners.
“English” and “metric” fasteners can be easily confused.
If
you use the wrong fasteners, parts can later break or fall off.
You could be hurt.
FUEL
Use premium unleaded gasoline rated at 91 octane or higher. It should
meet specifications ASTM D4814 in the U.S. and CGSB 3.5-92 in
Canada. These fuels should have the proper additives,
so you should not
have
to add anything to the fuel.
In the U.S. and Canada, it’s easy to be sure you get the right kind of
gasoline (unleaded). You’ll see “UNLEADED” right on the pump. And
only unleaded nozzles will fit into your vehicle’s filler neck.
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.
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Downloaded from www.Manualslib.com manuals search engine 3
What about gasoline with blending materials that contain oxygen, such as
MTBE or alcohol?
MTBE is “methyl tertiary-butyl ether.” Fuel that
is no more than 15%
MTBE is fine for your car.
Ethanol is ethyl or grain alcohol. Properly-blended fuel that is no more
than
10% ethanol is fine for your car.
Methanol is methyl or wood alcohol.
Gasolines for Cleaner Air
Your
use of gasoline with detergent additives will help prevent deposits
from forming in your engine and fuel system. That helps keep
your
engine in tune and your emission control system working properly. It’s
good for
your vehicle, and you’ll be doing your part for cleaner air.
Ivlany gasolines are now blended with materials called oxygenates.
General Motors recommends that you use gasolines with these blending
materials, such
as MTBE and ethanol. By doing so, you can help clean
the air, especially in those parts
of the country that have high carbon
monoxide levels.
In addition, some gasoline suppliers are now producing reformulated
gasolines. These gasolines are specially designed to reduce vehicle
emissions. General Motors recommends that you
use reformulated
gasoline. By doing
so, you can help clean the air, especially in those parts
of the country that have high ozone levels.
You should ask your service station operators if their gasolines contain
detergents and oxygenates, and
if they have been reformulated to reduce
ve
hide emissions.
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