Saab 2002 9-3, Owner'S Manual

Page: 171 / 256

171 Starting and driving
• Driving in a low gear results in higher fuel
consumption than in a high gear because
of the lower engine speed for a given road
speed. Always change up to a higher gear
as soon as traffic conditions allow and use
the highest gear as much as possible.
• Check the air pressure in the tires once a
month. Incorrect pressures increase tire
wear. It is better to have slightly higher
pressure than lower.
• Check fuel consumption regularly.
Increased consumption can indicate that
something is wrong and that the car
needs to be checked by an authorized
Saab dealer.
Practical tests on the roads have demon-
strated that substantial savings in fuel con-
sumption can be made if the above advice
is heeded.
Road conditions
Wet roads increase fuel consumption, as do
unpaved roads and driving in hilly country
(the amount of fuel saved driving downhill is
less than the additional amount required to
climb the hill).
Engine block heater (standard
equipment in Canada, accessory in
U.S.)
The following are just some of the benefits
to the car and the environment of using an
engine block heater:
• Lower fuel consumption.
• Reduced wear on the engine.
• Inside of car warms up faster.
• Exhaust emissions substantially reduced
over short runs.
The engine block heater is effective with
outside temperatures up to +60 – +70°F
(+15 – +20°C). The warmer it is outside, the
shorter the time the heater need be con-
nected. Longer than 1.5 hours is unneces-
sary.
If the car is equipped with a removable elec-
trical cabin heater that is not in use, this
should be stored in the luggage compart-
ment.
Driving in cold weather
Before starting a journey in cold weather
you should check the following:
• That the wiper blades have not become
frozen to the windshield/glass.
• Brush any snow away from the air intake
for the heater system (opening between
hood and windshield).
• It may be advisable to lubricate the
door-lock cylinder (use molybdenum
disulphide, MoS
2
) to prevent its freezing.
If the lock has frozen, take care not to
break the key (or use the remote control)
– heat it first or spray it with de-icer.
• Periodically during the winter, add gaso-
line anti-freeze to the fuel to dispel any
condensation in the fuel tank which could
freeze and cause problems in the system.
Keep the tank well filled to reduce the risk
of condensation forming.
If the car is parked outside in freezing
weather, fuel additives (gasoline
anti-freeze) will not do any good as it
cannot remove water that has already fro-
zen. Park the car in a warm place so that
any ice that may have built up melts, then
add gasoline
anti-freeze when filling up
the tank. Condensation is caused by
changes in the outdoor temperature or by
the car being parked alternately in a
garage and outside.
• It is particularly important when the roads
are slippery that the brakes and tires be in
good condition.