Subaru 2004 Impreza - Manual (Page 325)

8-14
Driving tips
! Wiper operation when snowing
Before driving in cold weather, make sure the wiper
blades are not frozen to the windshield or rear window.
If the wiper blades are frozen to the windshield or rear
window, use the defroster with the airflow control dial
in the “ ” position and the temperature control dial
set for maximum warmth until the wiper blades are
completely thawed out. If your vehicle is equipped with
a wiper deicer, it is helpful to thaw the windshield wiper
blades. To thaw out the rear wiper blade, use the rear
window defogger.
When driving in snow, if frozen snow starts to stick on
the surface of the windshield despite wiper operation,
use the defroster with the airflow control dial in “ ”
and the temperature control dial set for maximum
warmth. After the windshield gets warmed enough to
melt the frozen snow on it, wash it away using the
windshield washer.
Snow stuck on the wiper arm prevents the wiper from
working effectively. If snow is stuck on the wiper arm,
pull off the road to a safe place, then remove it. If you
stop the car at road side, use the hazard warning
flasher to alert other drivers.
We recommend use of non-freezing type wiper blades
(winter blades) during the seasons you could have
snow and sub-zero temperatures. Blades of this type
give superior wiping performance in snowy conditions.
Be sure to use blades that are suitable for your vehi-
cle.
! Corrosion protection
Refer to the “Corrosion protection” section (chapter
10).
! Snow tires
! All models except WRX-STi
" When replacing original tires with winter
(snow) tires, make sure you use only the same
size, construction and load range as the origi-
nal tires listed on the tire placard. Using other
sizes and construction may affect speedome-
ter/odometer calibration and clearance be-
tween the body and tires. It also may be danger-
ous and lead to loss of vehicle control.
"
You must install four winter tires that are of
the same size, construction, brand, and load
range. Mixing other sizes or constructions may
result in severe mechanical damage to the drive