1996 Buick Skylark Owner's Manual - Page 240

What Kind of Oil to Use Oils recommended for your vehicle can be identified by This symbol looking for the "Starburst" symbol. indicates thatthe oil has been certified by the American oil Petroleum Institute(API). Do not use any which does not carry this Starburst symbol. 3.1L Engine The engine oil fill cap on the 3.1L V-6 engine is located oil on thefront,of the engine near the engine dipstick. Just fill it enough to put the level somewhere in the proper operating range. Push the dipstickthe way all back when you're through. ' i n 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 surethe oil put into your engine is American Petroleum Institute certified for gasoline engines. You should also use the proper viscosity for your oil vehicle, as shown the following chart: in 6-13