1996 Buick Regal Owner's Manual - Page 310

I Short Trip/City Maintenance Schedule I 99,000 Miles (165 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 96,000 Miles (160 000 - r ) n 0Change engineoil and filter (or every 3 months, whichever occurs first). An Emission.Control Service. 0Lubricate steering ball joints (or every 6 months, whichever occurs first). DATE ACTUAL MILEAGE SERVICED B Y I I I DATE ACTUAL MILEAGE I SERVICED B Y 7-24