1994 Buick Skylark Owner's Manual - Page 214

Engine Oil If the "Check Oil" light on the instrument panel comes on, it means you need to check your engine oil level right away. CHECK OIL For more information, see "Check'Oil"Iight in the Index. You should check your engine oil level regularly; this is an added reminder. Before closing the hood, be all the filler caps are on sure properly. Then just pull the hood down and closefirmly. it oil It's a good idea to check your engine 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.