Engine Oil Additives - Hummer 2003 H2 Owner's Manual

As in the chart shown previously, SAE 5W
only viscosity grade recommended for your vehicle.
You should look for and use only oils which have the
API Starburst symbol and which are also identified as
-
SAE 5W 30. If you cannot find such SAE 5W
-
you can use an SAE 10W
Starburst symbol, if it's going to be 0
above. Do not use other viscosity grade oils, such as
-
SAE 10W 40 or SAE 20W
NOTICE:
Use only engine oil with 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.
R
GM Goodwrench oil meets all the requirements for
your vehicle.
If you are in an area of extreme cold, where the
-
temperature falls below 20
recommended that you use either an SAE 5W
synthetic oil or an SAE 0W
easier cold starting and better protection for your engine
at extremely low temperatures.
-
30 is the
-
30 oils,
30 oil which has the API
_ _
-
F ( 18 C) or
-
50 under any conditions.
_ _
-
F ( 29 C), it is
-
30
-
30 oil. Both will provide

Engine Oil Additives

Don't add anything to your oil. The recommended oils
with the starburst symbol are all you will need for good
performance and engine protection.
When to Change Engine Oil
(GM Oil Life System
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 message will
come on. Change your oil as soon as possible within
the next two times you stop for fuel. It is possible that,
if you are driving under the best conditions, the oil life
system may not indicate that an oil change is necessary
for over a year. However, your engine oil and filter must
be changed at least once a year and at this time the
system must be reset. It is also important to check your
oil regularly and keep it at the proper level.
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