2001 Buick Regal Owner's Manual - Page 267

Be sure to 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. What Kind of Engine 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, 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 oil put into your engine is American Petroleum Institute certified for gasoline engines. The engine oil fill cap is located toward the front of the engine near the yellow-looped engine oil dipstick handle. See "Engine Compartment Overview" in the Index for more information on location. 6-16