1998 Pontiac Grand Am Owner's Manual - Page 249
1998 Pontiac Grand Am Manual
Page 249 highlights
What Kind of Engine Oil to Use Oils recommendedfor your vehicle can be identified by This symbol looking forthe "Starburst" symbol. indicates that the oil has been certified American by the Petroleum Institute(API). Do not useany oil which does notcarry this Starburst symbol. If you change your own oil, be sure you use that has oil the Starburst symbol on the front of the oil container. If you have your oil changed for you, be sure the oil put 3100 Engine The 3100 engine oil fill capis on the front the engine, of behind the radiator. Be sure tofill it enough toput the level somewhere in the proper operating range. Push the dipstick allway the back in when you're through. A into your engineis American Petroleum Institute certified for gasoline engines. You should also use the proper viscosityoil for your vehicle, as shown in the following chart: 6-16