1998 Pontiac Sunfire Owner's Manual - Page 259
1998 Pontiac Sunfire Manual
Page 259 highlights
RECOMMENDED SAE VISCOSITY MADE ENGINE OILS FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE...F- -1 HOT WEATHER 7 LOOK FOR THIS SYMBOL &$& - As shown in the chart, SAE 5W-30 is best for your vehicle. However, you can use SAE 1OW-30 if it's going F to be 0 O (- 18 C ) or above. These numbers on anoil container show its viscosity, or thickness. Do not use other viscosity oils, such as SAE 20W-50. O NOTICE: Use only engine oil with the American Petroleum Institute CertifiedFor 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. "F e lo[ + 80 + 60 + 40 + 20 0 SAE 1OW-30 F -30 REO COLD WEATHER DO NOT USE SAE 2OW-50OR ANYOTHER GRADE OIL NOT RECOMMENDED 6-15