1993 Buick Regal Owner's Manual - Page 244

When to Check: Check your tires once a month or more. Don't forget your compact sparetire. It should be at 60 psi (420 kPa). I I ' How to Check: Use a good quality pocket-type gage to check tire pressure. Simply looking at the tires will not tell you the pressure, especially if you have radial tires -which may look properly inflated even if they're underinflated. If your tires have valve caps, be sure toput them back on. They help prevent leaks by keeping out dirt and moisture. Use this rotation pattern. After the tires have been rotated, adjust the front and rear inflation pressure as shown on the Tire-Loading Information label. Make certain that all wheel nuts are properly tightened. See "Wheel Nut Torque" in the Index. Tire Inspection and Rotation To make your tires last longer, have them inspected and rotated at the mileages recommended in the Maintenance Schedule. See "Scheduled Maintenance Services" in the Index. 242