1999 Oldsmobile Intrigue Owner's Manual - Page 241

What Kind of Engine Oil to Use Oils recommended for your vehicle canbe identified by looking forthe "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 for you, be sure the oil put into your engine is American Petroleum Institute certified for gasoline engines. You should also use the proper viscosity oil for your I I RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE. I I HOT WEATHER /OF mT) LOOK FOR MIS SYMBOL 8- SAL 1OW-30 PREFERRED above 0°F (-18°C) vehicle, as shown in the following chart: .WJ COLD WEATHER SAE SW-30 I DO NOT USE SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED 6-13