Chevrolet Optra 2004 Owner's Manual page 268

CAUTION:
{
Rust or dirt on the wheel, or on the parts to
which it is fastened, can make the wheel nuts
become loose after a time. The wheel could
come off and cause an accident. When you
change a wheel, remove any 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; but be sure to use
a scraper or wire brush later, if you need to, to
get all the rust or dirt off.
5-70
8. Remove any rust or dirt
from the wheel bolts,
mounting surfaces
and spare wheel.
CAUTION:
{
Never use oil or grease on studs or nuts. If
you do, the nuts might come loose. Your wheel
could fall off, causing a serious accident.
9. Place the compact spare tire on the wheel-mounting
surface.
10. Install the wheel nuts with the rounded end of the
nuts toward the wheel. Tighten each nut by hand
clockwise until the wheel is held against the hub.
11. Lower the vehicle by turning the wheel wrench
counterclockwise. Lower the jack completely.
12. Tighten the wheel nuts
firmly in a crisscross
sequence, as shown.