Chevrolet 2003 Corvette Owner's Manual page 244

HQT
WEATHER
I W J
COLD
WEATHER
SAE 5W.
LOOK
FOR
T H I S
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SAE IOW-30
ACCEPTABLE
r
IF 5W-30 I S NOT
-30 AVAILABLE
RECOMMENDED
DO NOT USE SAE 1OW-40, SA€ 20W-50 OR ANY OTHER
V!SCOS!rv GRADE O!L NOT RECOMMENDED
SAE 5W-30
As shown in the viscosity chart, SAE 5W-30 is best
for your vehicle. However, you can use SAE
1O-W30 if it's going to be 0°F (-1 8°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).
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Standard 4718M and have the starburst symbol on the
front of the oil container.
Your vehicle's engine is filled at the factory with a
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your vehicle.
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