Buick 2003 Rendezvous Owner's Manual page 327

RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS
HOT
WEATHER
' O F
-
+ l o o - -
+ 8 0 -
-
+ 6 0 - -
+ 4 0 - -
+ 2 0 - -
O - -
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COLD
7
"C
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-
+ 2 7
+
16
-
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-
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18
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WEATHER
LOOK
FOR
T H I S
SYMBOL
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ACCEPTABLE SAE 1OW-30
v
IF 5W-30 IS NOT
-30 AVAILABLE
RECOMMENDED
DO NOT USE SAE iOW-40, SAE 20W-50 OR ANY OTHER
VISCOSITY GRADE OIL NOT RECOMMENDED
As in the chart shown previously, SAE 5W-30 is the
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-30 oils,
you can use an SAE IOW-30 oil which has the API
Starburst symbol, if it's going to be 0°F (-18°C)
or above. Do not use other viscosity grade oils, such as
SAE 1OW-40 or SAE 20W-50 under any conditions.
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@ oil meets all the requirements for
your vehicle.
If you are in an area of extreme cold, where the
temperature falls below -20°F (-29"C), it is
recommended that you use either an SAE 5W-30
synthetic oil or an SAE OW-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.
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