1996 Oldsmobile Aurora Owner's Manual - Page 257

When to Add Oil If the oil is at or below theADD line, then you'll need to This add some oil. But you must use the right kind. part explains what kind of oil to use. For crankcase capacity, see "Capacities and Specifications"in the Index. 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 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 vehicle, as shown in the following chart: NOTICE: Don't add too much oil. If your engine has so much oil thatthe oil level gets above the upper mark that shows the proper operating range, your engine could be damaged. Just fill itenough to put thelevel somewhere in the proper operating range. Push the dipstick all the way back in when you're through.