1997 Oldsmobile Cutlass Supreme Owner's Manual - Page 257

When to Check Check your tires once a month or more. Don't forget your compact spare tire. It should be at 60 psi (420 E a ) . rotation is the most important. See "Scheduled Maintenance Services"in the Indexfor scheduled rotation intervals. How to Check Use a good quality pocket-type gage to check tire pressure. You can't tell if yourtires are properly inflated simply by looking at them. Radial tires may look properly inflated even when they're underinflated. Be sure to put the valve caps back on the valve stems. They help prevent leaks by keeping out dirt and moisture. Tire Inspection and Rotation Tires should be rotated every 6,000 to 8,000 miles (10 000 to 13 000 km). Any time you notice unusual wear, rotate your tires as soon as possible and check wheel alignment. Also check for darnaged tires or wheels. See "When It's Time for New Tires" and "Wheel Replacement" laterin this sectionfor more information. The purposeof regular rotation is to achieve more uniform wearfor dl tires on the vehicle. Thefirst When rotating your tires, always use the correct rotation pattern shown here. Don't include the compact spare tire in your tire rotation. After the tires have been rotated, adjust the front and rear inflation pressures as shown on the Tire-Loading Information label. Make certain that all wheel nuts are properly tightened. See "Wheel Nut Torque" in the Index. 6-34