1995 Chevrolet Corvette Owner's Manual - Page 239

1995 Chevrolet Corvette Manual

Page 239 highlights

Gasolines for Cleaner Air Your use of gasoline with deposit controladditives will help preventdeposits 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. Many gasolines are now blended with oxygenates. General Motors recommends that you use gasolines with these blending materials, such as MTBEand ethanol. By doing so, you can help cleanthe air, especially in those parts of the country that have high carbon monoxide levels. In addition, some gasoline suppliers arenow producing reformulated gasolines. These gasolinesare specially designed toreduce 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 askyour service station operators if their gasolines contain deposit control additives and oxygenates, and if they have been reformulated to reduce vehicle emissions. 5.7L LT1 (Code P) Engine Use premium unleaded gasoline rated at 91 octane or higher for best performance. You may use middle grade or regular unleaded gasolines, but your vehicle may not accelerate as well. The gasoline you use should meet specifications ASTM D4814 in the United States 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 United States 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 intoyour vehicle'sfiller neck. Be sure the posted octane for premium is at least 91 (at least 89 for middle grade and 87 for regular). If the octane is less than 87, you may get a heavyknocking noise when you drive. If it's bad enough, it can damage your engine. If you're using fuel rated at 91 octane or higher and you still hear heavy knocking, your engine needs service. But don't worry if you hear a little pinging noise when you're accelerating or driving up a hill. That's normal and you don't have to buy a higher octane fuel to get rid of pinging. It's the heavy, constant knock that means you have a problem. 6-4

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Gasolines
for
Cleaner
Air
Your use
of
gasoline with deposit
control 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.
Many gasolines
are
now blended with 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 deposit
control
additives
and
oxygenates, and if they have been reformulated to
reduce vehicle emissions.
5.7L
LT1
(Code
P)
Engine
Use premium unleaded gasoline rated at
91
octane or
higher
for
best performance. You may
use middle grade
or regular unleaded gasolines, but
your vehicle may
not
accelerate as
well.
The
gasoline you use should meet
specifications
ASTM
D4814 in the United States 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 United States 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’sfiller neck.
Be sure the posted octane for premium
is
at least 91 (at
least
89
for middle grade and 87 for regular).
If
the
octane
is
less
than
87,
you
may get a
heavy knocking
noise when you drive. If it’s bad enough, it can damage
your engine.
If you’re using fuel rated at 91 octane or higher and
you
still hear heavy knocking, your engine needs service.
But don’t worry if
you hear a little pinging noise when
you’re accelerating or driving up
a hill. That’s
normal
and you don’t have to buy
a higher octane fuel to get rid
of
pinging. It’s the heavy, constant knock that means
you have a problem.
6-4