2009 SAAB 9-5 fuel consumption

68 Instruments and controlsSaab Information
Display (SID) The Saab Information Display (SID) shows
CHECK messages and incorporates eight
trip-computer functions.
Use the i/SET button to browse the func-
tions.
Outdoor temperature(Frost warning)
Regardless of which function has been
selected, except Night Panel Mode, SID will
automatically display the outdoor tempera-
ture when it is between 26° and 38°F (–3°
and +3°C). This also applies if the
temperature has moved outside the range
of 21° to 43°F (–6° to +6°C) but is again
between 26° and 38°F (–3° and +3°C).

WARNING
It is strongly recommended that the SID
settings be changed only when the car is
stationary. The driver’s attention can oth-
erwise easily be distracted from the road.
SID provides the following function:
Te m p .Outside temperature
D.T.E.Estimated range (distance to
empty fuel tank)
Fuel ØAverage fuel consumption
since function last reset
Dist.Distance to destination/Trip
meter
Speed ØAverage speed since function
last reset
AlarmAlarm function
Speed W.Speed warning
WARNING
Remember that roads can be icy even at
temperatures of above 38°F (+3°C),
especially on bridges and stretches of
road that are sheltered from the sun.
IB3928
SID, buttons and display
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70 Instruments and controlsUsing Dist. as a trip meter
If no value is programmed in Dist., it func-
tions as a trip meter. This is indicated by an
arrow to the right in the display.
Reset the trip meter by briefly pressing the
CLR button.
Calculating the arrival time if a specified
average speed is maintained:
1Select Dist.
2 Set the distance.
3Select Speed Ø.
4 Set the average speed you intend to
drive at.
5 SID switches to Dist. automatically. The
calculated arrival time is now displayed
to the right.
The Speed Ø function will show actual
values once you start driving.Average fuel consumption, Fuel Ø
The average fuel consumption is calculated
using the values for fuel consumed and dis-
tance driven since last reset. This value is
stored in the car’s trip computer even when
the engine is switched off.
To reset the value, hold CLR depressed
until a chime sounds. The text Cleared is
displayed.
Resetting valuesTo reset the value, hold CLR depressed
until a chime sounds. The text Cleared is
displayed.
The following functions will be reset simulta-
neously:
D.T.E. (the value is reset to the distance
that can be reached with the amount of
remaining fuel)
FuelØ
Speed Ø (average speed)
Values programmed in Dist., Alarm and
Speed W. are not reset. See respective
function
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153 Starting and driving
Lock-up function The automatic transmission has a lock-up
function, which can render the torque con-
verter inoperative in 3rd, 4th and 5th gears,
thus reducing the engine speed and fuel
consumption.
When the lock-up function comes into oper-
ation, it may give the impression of an over-
drive being engaged.Kick-downWhen the accelerator is pressed down hard,
a change-down to the next gear will be
effected to provide maximum acceleration,
e.g. for overtaking.
Following this, the next higher gear will be
selected at the optimum engine speed for
acceleration or, if you ease off the acceler-
ator, before reaching this.
Park Brake Shift LockThe transmission has a security function
known as Park Brake Shift Lock. To move
the gear selector out of the P position, the
brake pedal must be depressed at the same
time as the gear selector catch (detent) is
pressed in.
Shift Lock override
Check fuse No. 1 (see page 216). If the
problem was cured by changing the fuse or
battery, you do not have to contact a work-
shop.
If the fuse blows again as soon as the Shift
Lock feature is activated you should contact
a workshop. We recommend that you con-
tact an authorized Saab dealer.If the fuse is OK, check the battery regarding
the voltage.
1 Apply the parking brake
2 Make sure the key is in position ON
3 Use a small tool such as a screwdriver
and push the lever (see picture) down-
wards so that the detent button can be
pressed approx. 10 mm
4 Move the selector out of position P to N
5 Remove the tool
6 Release the parking brake if the car is to
be moved immediately; otherwise keep
it applied.NOTICEDue to electrical problems it may not be
possible to move the selector out of the
park position, even if the ignition is ON. If
for some reason the selector has to be
moved out of the park position (i.e. to tow
the car a short distance) do as described
below.
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170 Starting and drivingEconomical motoringFactors affecting fuel
consumptionFuel consumption is greatly affected by the
general driving conditions, the way in which
the car is driven and at what speeds, the
weather, the state of the road, the condition
of the car, etc. Breaking-inFuel consumption may be somewhat higher
during the break-in period (the first 3,000–
4,000 miles (5,000–7,000 km) than stated.Weather conditionsFuel consumption can be as much as 10 %
lower in summer than in winter. The higher
consumption in cold weather is explained by
the longer time it takes for the engine to
reach normal operating temperature, and
for the transmission and wheel bearings to
warm up. Fuel economy is also affected by
the distance driven: short journeys of
3–5 miles (5–8 km) do not give the engine
enough time to reach normal temperature.
Strong winds can also affect fuel con-
sumption. How to read the graph above:
If fuel consumption with the engine at
normal temperature is 28 mpg
(10l/100 km), the actual fuel consumption 3
miles (5 km) after the engine has started
from cold will be:
– 23.5 mpg (12l/100 km) at outside temp.
of 68°F (20°C) (increase of 20 %).
– 17.7 mpg (16l/100 km) at outside temp.
of 32°F (0°C) (increase of 60 %).
– 14 mpg (20l/100 km)) at outside temp. of
–4°F (–20°C) (increase of 100 %).
As can be seen, both the distance travelled
by the car and the outside temperature have
a major impact on fuel consumption after
the engine has started from cold. Thus, if the
car is mainly used for short journeys of
3–5 miles (5–8 km), the fuel consumption
will be 60–80 % higher than normal.
IB311
Percentage increase in fuel consumption
of engine starting from cold compared to
engine at normal temperature
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171 Starting and driving
Driving technique To obtain the best running economy, not
only regarding fuel consumption but
general wear also, regular service is
required.
 High speed, unnecessary acceleration,
heavy braking and much low gear work all
gives rise to higher fuel consumption.
 Frequent gear changing in traffic, starting
in cold weather, the use of studded tires
and roof racks, and towing a trailer all
increase fuel consumption.
 Do not run the engine when the car is
stationary.
If idling, it will take much longer before the
engine becomes hot. Engine wear is
greatest during this warming-up phase.
Therefore drive away as soon as possible
after the engine is started and avoid high
revving. Driving in a low gear results in higher fuel
consumption than in a high gear because
of the higher 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 a workshop. We
recommend that you contact an autho-
rized Saab dealer.
Practical trials on the roads have demon-
strated that substantial savings in fuel con-
sumption can be made if the above advice
is heeded.
Road conditionsWet 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).
WARNING
Never switch the engine off while driving
as the effect of the brakes and power
steering will be greatly reduced.
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172 Starting and drivingEngine block heater3The following are just some of the benefits
to the car and the environment of using an
engine block heater:
 Lower fuel consumption.
 Exhaust emissions substantially reduced
over short runs.
 Reduced wear on the engine.
 Inside of car warms up faster.
The engine heater is effective at outside
temperatures up to 58–68°F (+15–20°C).
The warmer it is outside, the shorter the time
the engine heater needs to be connected.
Longer than 1.5 hours is unnecessary.
If the car is equipped with a removable,
electrical cabin heater that is not in use, this
should be stored in the luggage compart-
ment.
Driving in cold weatherBefore 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
frozen. 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.
 Check the anti-freeze in the engine cool-
ant, see page 193.
The car´s trip computer will warn you when
there is a risk of slippery conditions. For fur-
ther information on this function, see
page 68.
The car is equipped with tires designed to
provide optimum grip on both wet and dry
roads, although this has been achieved at
the expense of somewhat reduced grip on
snow and ice. For regular driving on snow
and ice, we therefore recommend that
winter (snow) tires be fitted.
Winter (snow) tires, particularly studded
tires (where use is legally permitted), gener-
ally make driving safer on snow and ice.
Acquaint yourself with the legal provi-
sions governing the use of different
types of winter tires and snow chains.
Studded tires are not allowed in some
countries.
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180 Starting and drivingTires
The tire pressure should match the current
load and speed of the car; for cars sold in
U.S. see page 229; for cars sold in Canada
see page 263.
The tire pressures given apply to cold tires,
that is tires that are the same temperature
as the outside air temperature.
The tire pressure increases as the tires
become warm (e.g. during highway driving)
with approximately 0.3 bar (4 psi). When
the temperature of the tires changes by 50°
(10°C), the tire pressure will change 0.1 bar
(2 psi).Never reduce the pressure of a hot tire. If the
tires are hot when you check them, only
increase the pressure, if necessary.
Underinflated tires wear more quickly than
slightly overinflated tires.
If a valve is leaking, simply unscrew it and fit
a new one.
Important! Remember to adjust the tire
pressures if you change the load in the car
or intend to drive at substantially lower or
higher speeds than normal.
WARNING
Check the tire pressure at least once a
month and before long journeys. Under-
inflation can result in:
 Punctures
 Separation of the tire and tread
 Damage to the sidewalls
 Damage to the rims on poor roads
 Poor handling characteristics
 Premature tire wear
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191 Car care and technical information
Saab Trionic engine
management systemThe Saab Trionic engine management
system is a unique Saab development that
combines sequential multiport fuel injection,
electronic distributorless ignition and turbo-
charger boost pressure control into one sys-
tem.
The Trionic engine control module (ECM)
monitors many different engine parameters
such as:
 Intake manifold pressure
 Intake air temperature
 Crankshaft position
 Engine coolant temperature
 Throttle position and
 The oxygen content of the exhaust gases.
The ECM receives information regarding
engine knocking from a sophisticated feed-
back function in the ignition discharge unit.
By processing all of this information, the Tri-
onic system can control fuel injector open-
ing duration, ignition timing and turbo-
charger boost pressure to provide excellent
engine performance while maintaining low
emissions and fuel consumption.
ORVR (Onboard Refueling Vapor
Recovery)Hydrocarbon vapors formed when refueling
will be recovered by the car and not
released into the atmosphere. The hydro-
carbons are absorbed in a evaporative
emission canister. When the engine is sub-
sequently started, the evaporative emission
canister is gradually purged as air is sucked
into it through a shut-off valve. The hydro-
carbon/air mixture passes through the evap
canister purge valve and into the engine
where it is burned.
When refueling, make sure you screw the
filler cap on and keep turning until it has
clicked at least 3 times. Otherwise, it is pos-
sible for the CHECK ENGINE light to illumi-
nate.
Refueling, see page 146.
NOTICEThe Trionic engine management system
continuously monitors the operation of
these systems and has on-board diag-
nostic capabilities (OBD II).
If the ”Service Engine Light also known as
CHECK ENGINE” lamp in the main
instrument illuminates, this indicates that
the Trionic ECM has detected a problem.
The car will continue to operate, but per-
formance may be diminished. You should
have your car checked by a Saab dealer
as soon as possible.
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