Buick 2011 Regal - Manual (Page 248)

10-12 Vehicle Care
engine oils that meet the
requirements of the dexos™
specification.
Substitute Engine Oil: When adding
oil to maintain engine oil level, oil
meeting the dexos™ specification
might not be available. You can add
substitute oil designated SAE 5W-30
with the API starburst symbol at all
temperatures. Substitute oil not
meeting the dexos™ specification or
equivalent, however, should not be
used for an oil change.
Engine Oil Additives/Engine
Oil Flushes
Do not add anything to the oil. The
recommended oils that meet the
dexos™ specification are all that is
needed for good performance and
engine protection.
Engine oil system flushes are not
recommended and could cause
engine damage not covered by the
vehicle warranty.
Engine Oil Life System
When to Change Engine Oil
This vehicle has a computer system
that indicates 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 is
indicated can vary considerably. For
the oil life system to work properly,
the system must be reset every time
the oil is changed.
When the system has calculated
that oil life has been diminished, it
indicates that an oil change is
necessary. A CHANGE ENGINE
OIL SOON message comes on.
See Engine Oil Messages on
page 5‑26. Change the oil as soon
as possible within the next 1 000 km
(600 miles). It is possible that,
if 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
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, the oil must be
changed at 5 000 km (3,000 miles)
since the last oil change.
Remember to reset the oil life
system whenever the oil is changed.
How to Reset the Engine Oil
Life System
Reset the system whenever the
engine oil is changed so that the
system can calculate the next
engine oil change. To reset the
system:
1. Turn the ignition to ON/RUN with
the engine off.
2. Press the DIC menu button on
the turn signal lever to scroll
through the menu items on the
DIC screen.