• 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 Engines
starburst symbol. Failure to use
the recommended oil can result in
engine damage not covered by
your warranty.
Engine Oil Additives
Do not add anything to the oil.
The recommended oils with
the starburst symbol that meet
GM Standard GM6094M are all you
need for good performance and
engine protection.
Engine Oil Life System
When to Change Engine Oil
Your vehicle has a computer system
that lets you know when to change
the engine oil and filter. This is
based on engine revolutions
and engine temperature, and not
on mileage. Based on driving
conditions, the mileage at which an
oil change will be indicated can
vary considerably. For the oil
life system to work properly, you
must reset the system every
time the oil is changed.
When the system has calculated
that oil life has been diminished, it
will indicate that an oil change
is necessary. The letters InSP will
appear in the odometer display.
Change the oil as soon as possible
within the mileage indicated on
the display. If you are driving under
the best conditions, the oil life
system might indicate that an oil
change is necessary once a
year. The engine oil and filter must
be changed at least once a year
and at this time the system must be
reset. Your dealer/retailer has
trained service people who will
perform this work using genuine
parts and reset the system. It is also
important to check the oil regularly
and keep it at the proper level.
If the system is ever reset
accidentally, you must change the
oil at 3,000 miles (5 000 km)
since your last oil change.
Remember to reset the oil life
system whenever the oil is changed.
Vehicle Service and Care 9-9
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