GMC 2002 Savana - Manual (Page 282)

6-15
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.