1997 Pontiac Sunfire Owner's Manual - Page 257

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 hasbeen certified by the American Petroleum Institute (API). Do not use any oil which does not carry thisStarburst symbol. If you change yourown 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 oilput into your engine is This is where you add oil if you have a 2.4L engine. American Petroleum Be sure to fill it enough to put the level somewherein the proper operating range.Push the dipstick all the way back in when you're through. Institute certified for gasoline engines. You should also use the proper viscosity oil for your vehicle, as shown inthe following chart: 6-13