1993 Buick Regal Owner's Manual - Page 222

Before closing the hood, be sure all the filler caps are on properly. Then just pull the hood down and close itfirmly. It's a good idea to check your engine oil every time you get fuel. In order to get an accurate reading, the oil must be warm and the vehicle must be on level ground. Engine Oil If the "LOW OIL" light on the instrument panel comes on, it means you need to check your engine oil level right away. You should check your engine oil level regularly, the light is an added reminder. The dipstick is located near the front and center of the engine compartment. Turn off the engine and give the oil a few minutes to drain back into the oil pan. If you don't, the oil dipstick might not show the actual level.