1996 GMC Safari Owner's Manual - Page 243

What Kind of Oil to Use Oils recommended for your vehicle can be identified by looking for the "Starburst" symbol. This symbol indicates that the oil has been certified by the American Petroleum Institute (API). Do not use any oil which does not carry this Starburst symbol. If you change your own oil, be sure you use oil that has the Starburst symbol on the front of the oil container. If you have your oil changed f0.r you, be sure the oil put into your engine is American Petroleum Institute certified for gasoline engines. I ~~ RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS .. ~. -. FOR BESTFUELECONOMYANDCOLDSTARTING.SELECTTHELOWEST SAL VISCOSITY GRADE 011 FOR THE EXPECTED TEMPERATURE RANGE. ~...- HOT WEATHER / - LOOK FOR T I H S SYMBOL iI I "F + 100 + 80+ 60 t 40 + 20 - 0- I - You should also use the proper viscosity oil for your vehicle, as shown in the following chart: SAE 3W-30 PREFERRED 1 DO NOTUSESAE 2OW-50 OR ANYOTHER GRADE OIL NOTRECOMMENDED WEATHER 6-13