1994 Buick Regal Owner's Manual - Page 217

To Check Engine Oil Pull out the dipstick and clean it with a paper towel or cloth, then push it back in all the way. Remove it again, keeping the tip lower, and check the level. When to Add Oil If the oil is at or below the ADD line, then you'll need to add some oil. But you must use the right kind. This section explains what kind of oil to use. For crankcase capacity, see "Capacities and Specifications'' in the Index. A r A NOTICE: Don't add too much oil. If your engine has so much oil that the oil level gets above the cross-hatched area that shows the proper operating range, your engine could be damaged. The engine oil fill cap is located near the front and center of the engine compartment. 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. 215