2008 Saturn Astra Owner's Manual - Page 242
2008 Saturn Astra Manual
Page 242 highlights
9-52 Vehicle Service and Care { CAUTION Rust or dirt on a wheel, or on the parts to which it is fastened, can make wheel bolts become loose after time. The wheel could come off and cause a crash. When you change a wheel, remove any rust or dirt from places where the wheel attaches to the vehicle using a scraper or wire brush. Installing wheels with a good metal-to-metal contact at the mounting surfaces is necessary to prevent wheel bolts from becoming loose. To prevent corrosion or rust build-up, lightly coat the wheel hub center and the cone-shaped surface of each wheel bolt with wheel bearing grease, after a wheel change. See Changing a Flat Tire on page 9-60 for information on installing the tire and wheel assembly. Also see "Wheel Bolt Torque" under Capacities and Specifications on page 10-2. Adjust the front and rear tires to the recommended cold tire inflation pressure shown on the Tire and Loading Information label. See Inflation - Tire Pressure on page 9-46 and Loading the Vehicle on page 8-30. Use this pattern when rotating the vehicle tires. Do not include the compact spare tire in the tire rotation.