1995 Buick Regal Owner's Manual - Page 290

I MaintenanceSchedule I 1 90,000 Miles (150 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Senlice. 87,000 Miles (145 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Conttd Service. 0Lubricate the shift linkage, parking brake cable guides, underbody contact points and linkage (or every 6 months, whichever occurs first). 0Inspect engine accessory drive belt (or every 24 months, whichever occurs first). An Emission Control Service. 0Drain, flush and refill cooling system (or DATE ACTUAL MILEAGE SERVICED B Y every 24 months, whichever occurs first). See "Engine Coolant', in the Index for what to use. Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test the cooling system and pressure cap. A n Emission Control Service. 7-22