1996 Buick Roadmaster Owner's Manual - Page 231

Engine Oil If the LOW OIL LEVEL light on the instrument panel comes on, it means you need tocheck your engine oillevel right away. LOW OIL LEVEL For more information, see the Index. You should check in your engineoil level regularly;this is an added reminder. It's a good idea to check your engine oilevery time you get fuel. In order to get anaccurate reading, the oil must be warm and thevehicle must be on level ground. Turn off the engine and givethe oil a few minutes to drain back into the oil pan. If you don't, the oil dipstick might not showthe actual level. 6-a