Pontiac 1997 Grand Prix Owner's Manual page 286

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REClOMMENDED SA€ VISCOSITY GRADE ENGINE OILS
FOR BEST FUEL ECONOMY AND COLD STARTIMI;, SELECf
THE
LOWEST
SAL V!§COSITI WAD€ OIL FOR THE EXPECTED TEMPERATURE RANGE.
HOT
WEATHER
LOOK
FOR THIS
SYMBOL
SAE 1OW-30
COLD
WEATHER
DO NOT USE SAE 2OW-50 OR ANY OTHER
GRADE OIL NOT RECOMMENDED
Z O O
E n g i g
As shown in the chart, unless you have the 3800 engine,
SAE 5W-30 is best for your vehicle. However, you can
use SAE 1OW-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.
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