1998 Oldsmobile Aurora Owner's Manual - Page 265

I I RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS FOR BESTFUELECONOMYANDCOLDSTARTING,SELECTTHE LOWEST SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE. I I As shown in the chart, SAE low-30 is best for your vehicle. However, you can use SAE 5W-30 if it's going to be colderthan 60°F ( 16" C) before your next oil change. When it's very cold, you should useSAE 5W-30. These numbers on an oil container show its viscosity, or thickness.Do not use other viscosity oils. such as SAE 20W-50. HOT WEATHER /OF OC' NOTICE: +loo+EO+60- t38 - t27 - +16 - +40--+4 +20---7 0---18 I \ W I -1 111. I Use only engine oil with the American Petroleum Institute Certified For Gasoline Engines "Starburst" symbol. Failure to use the recommended oilcan result in engine damage not covered by your warranty. GM Goodwrench@ oil meets all the requirements for your vehicle. SAE 1 d - 3 0 PREFERRED above IPF (-l WC) SAE 5W-30 COLD WEATHER DO NOT USE SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED 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. 6-13