1995 Pontiac Trans Sport Owner's Manual - Page 282

What Kind of Oil to Use Oils of the proper quality for your vehicle can be identified by looking for the"Starburst" symbol. The "Starburst" symbol indicates that the oil has been certified by the American Petroleum Institute (API), and is preferred for use in your gasoline engine. Ik \ U I \ \ \ - r GASOLImmm 3800 V6: Adding Engine Oil The engine oil fill capis located just behind the engine oil dipstick. 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. If you change your own oil, be sure you use oil that has the "Starburst" symbol on the frontof 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 fur yourvehicle, as shown in the following charts: 6-13