Chevrolet 2001 Blazer Owner's Manual page 320

As in the chart shown previously, SAE 5W
your vehicle. However, you can use SAE 10W
_ _
-
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
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 where the temperature falls below
_ _
- -
20 F ( 29 C), consider using 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 best for
-
30 if it's
-
50.
-
30
-
30 oil. Both will provide
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