Recommended Sal Viscosity Grade Engine - Chevrolet 1997 Tahoe Owner's Manual

RECOMMENDED SAL VISCOSITY GRADE ENGINE OllS
FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST
SAL WSCOS171 GRADE 011 FOR THE EXPECTED TEMPERATURE RANGE.
HOT
WEATHER
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DO NOT USE
SAE
2OW-50 OR ANY OTHER
GRADE OIL NOT RECOMMENDED
As shown in the chart, 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.
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 where the temperature falls below
-20°F (-29"C), consider using 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.