1997 Pontiac Grand Am Owner's Manual - Page 242

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, 3100 Engine The 3100 engine oil fill cap is on the front of the engine, behind the radiator. Just fill it enough to put the level somewhere in the proper operating range. Push the dipstick all the way back in when you're through. I 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 surethe oil put into your engine is American Petroleum Institute certified for pasoline engines. L , You should also use the proper viscosity oil for your vehicle, as shown in the following chart: 6-15