Oldsmobile cutlass supreme 1996 Owner's Manual page 233

RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS
FOR BEST FUEL l"'na'n~Y AND COLD STARTING, SELECf W E LOWEST
SAL VISCOSITY JIL FOR THE EXPECTED TEMPERATURE RANGE.
WOK
F O R T H I S i
HOT
WEATHER
COLD
WEATHER
SYMBOL
I -
SAE
I
1OW-30
DO NOT USE SAE 2OW-50 OR ANY OTHER
GRADE OIL NOT RECOMMENDED
As shown in the chart, if you have the 3.1L 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 2OW-50.
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