1994 Buick Regal Owner's Manual - Page 239

Inflation - Tire Pressure When to Check The Tire-Loading Information label which is on the deck lidCheck your tires once a month or more. shows the correct inflation pressures for your tires, when Don't forget your compact spare tire. It should be at 60 they're cold. "Cold" means your vehicle has been sitting for psi (420 kPa). at least three hours or driven no more than a mile. How to Check NOTICE: Don't letanyone tell you that underinflation or overinflation is allright. It's not. If your tires don't have enough air (underinflation)you can get: 0 Too much flexing Too much heat Tire overloading Bad wear 0 Badhandling Bad fuel economy. If your tires have too muchair (overinflation), you canget: Unusual wear 0 Badhandling 0 Roughride Needless damage from road hazards. 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. 237