Saturn 2009 AURA Owner's Manual page 330

CAUTION:
{
Rust or dirt on a wheel, or on the parts to which
it is fastened, can make wheel nuts become loose
after time. The wheel could come off and cause an
accident. When changing a wheel, remove any rust
or dirt from places where the wheel attaches to the
vehicle. In an emergency, use a cloth or a paper
towel to do this; but be sure to use a scraper or wire
brush later, if needed, to get all the rust or dirt off.
See Changing a Flat Tire on page 5-68.
11. Install the compact spare tire.
5-74
10. Remove any rust or dirt
from the wheel bolts,
mounting surfaces
and spare wheel.
CAUTION:
{
Never use oil or grease on bolts or nuts because
the nuts might come loose. The vehicle's wheel
could fall off, causing a crash.
12. Put the wheel nuts back on with the rounded end
toward the wheel. Tighten each nut by hand or with
the wrench until the wheel is held against the hub.
13. Lower the vehicle by turning the wrench
counterclockwise. Lower the jack completely.