1998 GMC Safari Owner's Manual - Page 275

RECOMMENDED SAE VlSCOSlN GRADE E16ME OllS FOR BEST FUEL ECONOMY AN0 COLD STARTING, SELECT THE LOWEST SAE VISCOSITY 6RZLDE OIL FOR THE EXPECTED TEMPERAIIIR€ RANGE. HOT WEATHER F THIS m SYMBOL unm As shown in the chart,SAE 5W-30 is bestfor your vehicle. However, you can use A E 1OW-30 if it's going S to be0°F (- 18 C) or above. These numbers on an oil container showits viscosity, or thickness.Do not use other viscosity oils, such as SAE 20W-50. O NOTICE: G+ 100 +ea 7 "C t 38 + 27 + 60 + a0 + 20 0 + 16 +4 -1 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 below falls -20°F (-29"C), consider usingeither an SAE 5W-30 synthetic oil or an SAE OW-30 oil. Both will provide easier cold starting and better protection your engine for at extremely low temperatures. DO NOTUSE SAE 2OW-50 OR ANYOTHER GRADE OIL NOTRECOMMENDED - 10 WEATHER 6-13