Engine Oil Additives; Engine Oil Life System - Buick Automobile User Manual

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. A change engine oil light or, if your vehicle
has the Driver Information Center (DIC), a CHANGE OIL
SOON message will come on. See Change Engine Oil
Light on page 3-45 or DIC Warnings and Messages on
page 3-58. Change the oil as soon as possible within the
next 600 miles (1 000 km). It is possible that, if you are
driving under the best conditions, the oil life system might
not indicate that an oil change is necessary for over a
year. However, 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 the last
oil change. Remember to reset the oil life system
whenever the oil is changed.
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