Do not add anything to the oil. The recommended oils meeting 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.
Selecting the Right Engine Oil
(Diesel Engines)
What to Do with Used OilHood
To open the hood:
Pull the hood release lever with
this symbol on it. It is on the
lower left side of the instrument
panel between the door and
the steering wheel.
Go to the front of the vehicle to
find the secondary hood
release handle. The handle is
under the front edge ...