1995 Buick Roadmaster Owner's Manual - Page 122

Change Oil Indicator The amber CHANGE L O light is activated by the Engine Oil Life Moniitor System. The engineoil Me monitor system determind8 the conditionof the engine oil and lets you know when the oil should be changed. See "Engine Oil"in the Index. If the CHANGEOIL light stays on 20 seconds or for more after you turn on tlie ignition, have oil the changed. After changing the engine the system must be reset. oil, With the ignition key the kUN position, but the in engine off, fuiiy push and release accelerator pedal the three times withinfive seconds. The CHANGE OIL light will flash two times confim you have reset the to system. If the CHANGEOIL light comes on and stays on for five seconds, it did not reset. You'll need to reset the system again. CHANGE OIL It does thi$ by electronically receiving data from the Powertrain Control Module. data it receives The contains information about engine speed (revolutions per &Ute), coolant temperatureand vehicle speed.The oil life monitor uses this &&q . t , determine how much ~ the oil has degraded. When to change youroil depend$ an driving habits and conditibns because these directly affect engine speed, coolant temperature and vehick speed. Becauseof this, the CHANGE OIL light many comeon as early as 2,000 miles or less for harsh conditions. Battery Light When youturn the key to RUN or START, this red light will come on briefly, to show that your alternator and battery charging systems are working. VOLTS 2-64 - .