Engine Oil Additives; Use only engine oil with the American Petroleum; Institute Certified For Gasoline Engines starburst- Page 359

6-14

As in the chart shown previously, SAE 5W

-

30 is best for

your vehicle. However, you can use SAE 10W

-

30 if it’s

going to be 0

_

F (

-

18

_

C) or above. These numbers on an

oil container show its viscosity, or thickness. Do not use
other viscosity oils, such as SAE 20W

-

50.

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.

GM Goodwrench

R

 oil meets all the requirements for

your vehicle.

If you are in an area where the temperature falls 
below 

-

20

_

F (

-

29

_

C), consider using either an 

SAE 5W

-

30 synthetic oil or an SAE 0W

-

30 oil. 

Both will provide easier cold starting and better protection
for your engine at extremely low temperatures.

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

t

)

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.