Buick 2009 Enclave Owner's Manual page 285

What Kind of Engine Oil to Use
Look for three things:
•
GM6094M
Use only an oil that meets GM
Standard GM6094M.
•
SAE 5W-30
SAE 5W-30 is best for the
vehicle. These numbers on an oil
container show its viscosity, or
thickness. Do not use other
viscosity oils such as
SAE 20W-50.
•
American Petroleum Institute
(API) starburst symbol
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).
Notice: Use only engine oil
identified as meeting GM
Standard GM6094M and showing
the American Petroleum
Institute Certified For Gasoline
Service and Appearance Care
Engines starburst symbol. Failure
to use the recommended oil
can result in engine damage not
covered by the vehicle warranty.
Cold Temperature Operation
If in an area of extreme cold, where
the temperature falls below −20°F
(−29°C), use either an SAE 5W-30
synthetic oil or an SAE 0W-30
engine oil. Both provide easier cold
starting for the engine at extremely
low temperatures. Always use
an oil that meets the required
specification, GM6094M. See "What
Kind of Engine Oil to Use" for
more information.
Engine Oil Additives / Engine
Oil Flushes
Do not add anything to the oil. The
recommended oils with the
starburst symbol that meet GM
Standard GM6094M are all that is
needed for good performance
and engine protection.
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