1998 Buick Regal Owner's Manual - Page 339

I MaintenanceSchedule I has an Engine Oil LifeMonitor. This monitor will show you when to changethe engine oil m and filter -- usually between 3,000 miles (5 000 k ) and 7,500 miles (12 500 km) since yourlast oil change. Under severe conditions, the indicator come on may before 3,000 miles ( 5 000 km). Never drive your vehicle more than 7,500 miles (12 500 km) or 12months without an oil and filter change. The system won't detect dust in the oil. So if you drive in a dusty area, be sure to change your oil and filter m or every 3,000 miles (5 000 k ) sooner if the CHANGE OIL SOON light comes Remember toreset the Oil on. Life Monitor when the oil has been changed. For more information, see "Change Oil Soon Light" in Index. the The services shown in this schedule to 100,000 miles up m should be performed after 100,000miles (166 000 k ) shown (166 000 km) at the same intervals. The services at 150,000 miles (240 000 k ) m should be performed at the same interval after150,000 miles (240 000 km). See "Owner Checks and Services" "Periodic and Maintenance Inspections" following. * Your vehicle Footnotes The U.S. Environmental Protection Agency or the California Air Resources Boardhas determined thatthe will failure to perform this maintenance item not nullify the emission warranty or limit recallliability prior to the completion of the vehicle's useful life.We, however, urge that all recommended maintenance services be performed at the indicated intervals and the maintenance be recorded. + A good time to check your brakes during tire is rotation. See "Brake System Inspection" under "Periodic Maintenance Inspections" in Part C of this schedule. 7-5