1994 Buick Roadmaster Owner's Manual - Page 125

Low Oil Level Light The "Low OilLevel" light should come on briefly while you are starting your engine. If the light doesn't come on, have your vehicle serviced, so it will be ready to warn you if there's a problem.. Change Oil Indicator The "Change Oil" light is activated by the Engine Oil Life Monitor System. The engine oil life monitor system determines the conditionof the engine oil and letsyou know when the oil shouldbe changed. See "Engine Oil" in the Index. It does this by electronically receiving data from the Powertrain Control Module.The data it receives contains information about engine speed (revolutions per minute), coolant temperature and vehicle speed. The oil life monitor uses this data to determine how much the oil hasdegraded. When to change your oil depends on driving habits and conditions because these directly affect engine speed, coolant temperature and vehicle speed. Because this, of the "Change Oil" light many come on as earlyas 2,000 miles or lessfor harsh conditions. LOW 01.L LEV When the "LOW OIL LEV" light comes on you should check your engine oil leveland fill if necessary. See Engine Oil in the Index. If the light stays on, yourengine oil level shouldbe change the checked. Check your oil level (be sure your vehicle is on If the "Change Oil" light is on continuously, oil. a level surface),and bring the engine oil up to the proper level, if necessary. See "Engine Oil" in the Index. 123