1998 Buick Century Owner's Manual - Page 139

Low Oil Level Light Don't keep driving if the oil pressure is low. If you do, your engine can become so hot that it catches fire. You or others could beburned. Check your oil as soon as possible and have your vehicle serviced. Your engine is equipped with an oil levelmonitoring system. When the ignition key is turned on, the LOW OIL light will come on briefly. LOW OIL If the lightdoes not come on briefly, have it fixed so it will be ready to warn you if there's a problem. NOTICE: Damage to your engine from neglected oil problems can be costlyand is not covered by your warranty. If the light stays on, stopthe vehicle on a level surface and turn the engine off. Check the oil level using the engine oil dipstick. (See "Engine Oil" in the Index.) If the lightdoes not flash, havethe low oil level sensor system repaired so it will be ready to warn you if there's a problem. The oil level monitoring system only checks oil level during thebrief period between key on and engine crank. Itdoes not monitor engine oil level when the engine isrunning. Additionally, an oil level check is only performed if the enginehas been turned off for a considerable period of time, allowing the oil normally in circulation to drain back into theoil pan. 2-63