Chevrolet 1998 Corvette Owner's Manual page 259

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RECOMMENDED SAL VlSCOSlTT GRADE ENGINE OILS
FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE
LOWEST
SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE.
HOT
WEATHER
' T C )
~fi
+
20
0
SAE SW-30
PREFERRED
COLD
WEATHER
FOR THIS
WOK
SYMBOL
, I
SAE
I
1OW-30
DO
NOT USE SAE 2OW-50
OR
ANY OTHER
GRADE OIL NOT RECOMMENDED
0
SAE 5W-30
As shown in the viscosity chart, SAE 5W-30 is best
for your vehicle. However, you can use SAE
1OW-30 if it's going to be 0°F (-18°C) or above.'
These numbers on an oil container show its viscosity,
or thickness. Do not use other viscosity oils such as
SAE 2OW-50.
Oils meeting these
requirements should also
have the "Starburst" symbol
on the container.
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.
6-14

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