Pontiac 2008 G8 Owner's Manual page 193

What Kind of Engine Oil to Use Look for three things:
•
GM6094M
Your vehicle's engine requires oil
meeting GM Standard
GM6094M. Look for and use
only an oil that meets GM
Standard GM6094M.
•
SAE 5W-30
As shown in the viscosity chart,
SAE 5W-30 is best for your
vehicle.
These numbers on an oil
container show its viscosity, or
thickness. Do not use other
viscosity oils such as
SAE 20W-50.
•
Oils meeting these requirements
should have the starburst
symbol on the container. This
symbol indicates that the oil has
been certified by the American
Petroleum Institute (API).
Vehicle Service and Care
Look for this information on the oil
container, and use only those
oils that are identified as meeting
GM Standard GM6094M and
have the starburst symbol on the
front of the oil container.
Notice: Use only engine oil
identified as meeting GM
Standard GM6094M and showing
the American Petroleum
Institute Certified For Gasoline
Engines starburst symbol. Failure
to use the recommended oil
can result in engine damage not
covered by your warranty.
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