Chevrolet 2003 S10 Pickup Owner's Manual page 280

If you choose to perform
n
the engine oil change
service yourself, be sure
the oil you use has
the starburst symbol on
the front of the oil
container. If you have your
oil changed for you, be
sure the oil put into
your engine is American
Petroleum Institute certified
for gasoline engines.
You should also use the proper viscosity oil for your
vehicle, as shown in the viscosity chart.
RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS
HOT
WEATHER
LOOK
FOR THIS
SYMBOL
-
+38
+
21
-
+
16
- t 4
-
- 7
SAE
I OW-30
ACCEPTABLE
IF 5W-30 IS NOT
SAE 5W-30 AVAILABLE I
RECOMMENDED
COLD
WEATHER
DO NOT USE SAE 1OW-40, SAE 2OW-50
OR
ANY OTHER
WSCOSIN GRADE OIL NOT RECOMMENDED
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