Corrosion Prevention - Porsche 928 1980 Owner's Manual

Hints for Winter Operation
Engine oil
High quality multi-grade oils are suitable for
all year round driving. Seasonal oil changes
are therefore not necessary. Only if multi-
grade oils are not readily available should
a single-grade oil of the correct viscosity be
used for winter weather driving. Specifica-
tions of the various oils to be used are
detailed under "Filling Capacities". The use
of oil additives is not recommended by
Porsche.
Battery
When outside temperatures fall, the bat-
tery's capacity decreases, but at the same
time the load placed on it increases conside-
rably. Therefore check the condition of the
battery in time and, if necessary, have it
charged. Check also the level of the electro-
lyte and add distilled water if required. Bat-
tery terminals should be greased with petro-
leum jelly.

Corrosion prevention

The road salts used to keep the roads and
highways free of ice and snow promote cor-
rosion. For this reason, we recommend that
any damage to the factory-applied under-
coating be repaired before the winter. Pro-
tective sprays containing oil should not be
used as they attack both the rubber com-
ponents and the protective undercoating.
44
In addition, the body should be coated with
wax for protection, and the chrome orna-
mentation on the car, including hub caps
and bumpers, with a chrome preservative.
Coolant
For year round driving, your Porsche is
delivered with anti-freeze coolant in the ra-
diator for temperatures down to
- 2 3 F / - 3 0 ° C for U.S.A.
- 4 0 ° F/—40° C for Canada.
Anti-freeze consistency
At the beginning of the winter season, have
the coolant checked for antifreeze consist-
ency, particularly if you have added only
clear water before. Use any quality anti-
freeze containing ethylene glycol.
The mixing ratios between water and anti-
freeze depend on outside temperatures to
be expected and are listed under "Capac-
ities". The ratios can also be taken from the
container of the anti-freeze manufacturer.
Do not use engine coolant anti-freeze or
any other solution that can damage the
car paint.
Washer reservoir
To assure that the windshield washer and
the headlight washer (where applicable)
systems also function at freezing tempera-
tures, anti-freeze must be added to the wa-
ter beforehand. Follow the instructions on
the can for the right amount to be used.
Winter tires, snow chaines
Winter radial ply tires give good traction in
snow or slush. For a better grip on hard snow
or ice, you can use winter tires with studs,
but check with your local Motor Vehicle
Bureau for possible restrictions.
Winter tires with studs should be run at mo-
derate speed when new to give the studs
time to settle.
Winter tires should always be mounted on
all four wheels. They should also conform to
the same load requirements as original
equipment tires.
For safety reasons, it is not advisable to
drive with winter tires at prolonged high
speeds. Winter tires do not have the same
degree of traction on dry, wet or snow-free
roads as regular tires. Winter tires would
wear rapidly under these conditions.
Snow chains can only be mounted on the
rear wheels. Use only snow chains with fine
pitch links, so that enough space remains
between the chains and the inside of the
wheel arches.
Wheels must rotate freely in all steering
positions with chains mounted to prevent
damage to body, rear axle or brake compo-
nents. Follow instructions issued by the
supplier of the chains. Remove chains as
soon as roads are free from snow.
Your Porsche dealer can assist you in choos-
ing suitable winter tires and snow chains.
Ski racks and roof racks
Ski racks and roof racks must never be
attached to the drip molding around the
roof panel. Your authorized Porsche dealer
can assist you in obtaining and installing the
correct equipment.