1996 Buick Riviera Owner's Manual - Page 223

I 1 7.- Remove my rust or dirt from thewheelbolts, mounting surfacesand spare wheel. A CAUTIO Never use oil grease on studs or nuts. If yon or do, the nutsmight come loose. Your wheel could .fall off, causing a serious accident. - 8 . Place the spare on the wheel mounting surface. Rust or'dirt on the wheel, or on the partsto which it is.fastened, can make the wheel nuts b.ecome looseafter a time. The wheel could come off and cause an accident.,When you change a wheel, rerrioveany rust or dirt from the places where the wheel attaches to the vehicle. In an emergency, you can use a cloth or a paper towel to do this; be sure to use a scraper or wire but brush later, if you need to, to get all the rustor dirt off.