User Manual - Page 233

For 2003 ALERO.

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What
Kind
of
Engine
Oil
to
Use
Oils recommended for your vehicle can be identified by
looking for the starburst symbol.
This symbol indicates that the oil has been certified by
the American Petroleum Institute
(API).
Do
not use
any oil which does not carry this starburst symbol.
If
you choose to perform
the engine oil change
service yourself, be sure
the oil you use has
the starburst symbol on
the front of the oil
container.
If
you have your
oil changed for you, be
sure the oil put into
your engine is American
Petroleum Institute certified
for gasoline engines.
You should also use the proper viscosity oil for your
vehicle,
as
shown
in
the viscosity chart.
RECOMMENDED
SAE
VISCOSITY
GRADE
ENGINE
OILS
HOT
WEATHER
(0
1
RECOMMENDED
COLD
WEATHER
DO NOT USE
SAE
1OW-40,
SAE
2OW-50
OR
ANY
OTHER
VlSCOSlN
GRADE
OIL
NOT RECOMMENDED
I
5-1
8
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