2004 SAAB 9-3 fuel consumption

84 Instruments and controlsThe number of systems that are displayed
on the SID depends on the car’s equipment
level. The list shown below includes the
systems that can be found in your car.
Trip computer function of the SIDSID contains the following functions:
Park Assistance, page 172.
SPA onSPA off
Clock / Alarm, page 88.
Set ClockSet Alarm 08:30
Rain Sensor, page 96.
HighMediumLow
Climate System, page 112.
Rear DefrosterHeated SeatsFan SettingsAir DistributionA/C ModeDual/Single ZoneDefault Settings
System Settings, page 89.
LanguageUnitSpeed Scale Illum.Service Info
WARNING
It is strongly recommended that the SID
settings be changed only when the car is
stationary. The driver’s attention can
otherwise easily be distracted from the
road.
Te m pOutdoor temperature
D.T.E. Estimated range (distance to
empty fuel tank)
Fuel ØAverage fuel consumption
since function last reset
DateDate
DistDistance to destinations.
Function can also be used as
a trip meter
ArrivEstimated time of arrival
Speed Ø Average speed since func-
tion last reset
Speed WSpeed warning (chime)
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173 Starting and driving
Economical drivingFactors affecting fuel consumptionThe fuel consumption of a car is greatly
affected by driving conditions, climate, road
conditions, speed, driving technique, and
so on.Breaking-inFuel consumption may be somewhat
higher during the break-in period (the
first 3,000–4,000 miles (5,000–7,000 km)).Weather conditionsSummer temperatures give better fuel
economy than winter ones. The difference
can be as much as about 10%. Consump-
tion increases in cold weather because the
engine takes longer to reach its normal
operating temperature. The transmission
and wheel bearings also take longer to
warm up. Even distance affects consump-
tion: short journeys of 3–5 miles (5–8 km)
do not give the engine enough time to
reach its optimum temperature. Wind con-
ditions also have a marked effect on fuel
consumption.How to read the diagram:
If fuel consumption with the engine at
normal temperature is 28 mpg (10 l/
100 km), the actual fuel consumption
3 miles (5 km) after the engine has started
from cold will be:
– 23.5 mpg (12 l/100 km) at outside temp.
of 68°F (+20°C) (increase of 20%).
– 17.7 mpg (16 l/100 km) at outside temp.
of 32°F (0°C) (increase of 60%).
– 14 mpg (20 l/100 km) at outside temp.
of –4°F (–20°C) (increase of 100%).
It is clear from the diagram that both dis-
tance driven and outside temperature have
a significant impact on fuel consumption,
after a cold start.
If the car is normally driven on short jour-
neys, 3–5 miles (5–8 km), for example to
and from work, the average consumption
will be 60–80% above the normal level.
Driving techniques To obtain the best running economy, with
regard to fuel consumption and general
wear, the car must be serviced regularly.
 High speed, unnecessary acceleration,
frequent braking and much changing
down all give higher fuel consumption.
 Frequent gear changing in traffic, starting
in cold weather, the use of studded tires
and roof racks, and towing a caravan all
increase fuel consumption.
 Do not warm up the engine while the car
is stationary.
If idling, the engine will take much longer
to reach its optimum temperature, and Percentage increase in fuel consumption
of engine starting from cold compared to
engine at normal temperature.
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174 Starting and drivingengine wear is at its greatest during this
period. Drive off as soon as possible after
starting the engine and avoid high engine
speeds.
 Drive as smoothly and thoughtfully as
possible. Match your driving to the
prevailing traffic conditions.
 Driving in a low gear gives rise to higher
fuel consumption than driving in a high
gear because of the higher engine speed
for any given road speed. Always shift up
as soon as traffic conditions allow and
drive in the highest gear as much as
possible.
 Check the tire pressure once a month.
Incorrect tire pressure increases tire
wear. It is preferable for the tire pressure
to be slightly high than too low. Under-
pressure increases fuel consumption. Check the fuel consumption regularly.
Increased fuel consumption can indicate
that something is wrong and that the car
needs to be checked at a Saab dealer.
Practical road tests have demonstrated that
substantial savings in fuel consumption can
be made if the above advice is followed.
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).
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 heater is effective at outside
temperatures up to 60–70°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,
electric cabin heater that is not in use, store
this in the trunk.
WARNING
Never switch off the engine while driving
as the effect of the brakes and power
steering will be greatly reduced.
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194 Car careSaab 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.
 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)All hydrocarbons formed when refueling will
be recovered by the car and not released
into the atmosphere. The hydrocarbons are
absorbed in an evaporative emission canis-
ter. When the engine is subsequently
started, the evaporative emission canister is
gradually purged as air is sucked into it
through a shut-off valve. The hydrocarbon/
air mixture passes through the evap canis-
ter purge valve and into the engine where it
is burned. “Refueling”, see page 147.
When refueling, make sure you screw the
filler cap on and keep turning until it has
clicked 3 times.
NOTICEThe Trionic engine management system
continuously monitors the operation of
these systems and has on-board diag-
nostic capabilities (OBD II). If the Engine
malfunction (CHECK ENGINE) light in
the main instrument illuminates, the
Trionic ECM has detected a problem. The
car will continue to operate, but perfor-
mance may be diminished. You should
have your car checked by a Saab dealer
as soon as possible.
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284 IndexDriving in cold climates
___________ 175
Driving in deep water
____________ 183
Driving in hot climates ____________ 177
Driving techniques
______________ 173
Driving with a heavy load on hilly
roads
________________________ 155
Driving with a load
______________ 183
Driving with a roof load ___________ 182
Driving with the compact spare wheel
187
Driving with the trunk lid open
______ 183
EEDR
_________________________ 266
ESP, anti-skid system
____________ 165
Easy entry, Convertible ____________ 65
Economical motoring
____________ 173
Electric engine heater ____________ 174
Electric heating, front seats
___ 102
, 111
Electric windows
________________ 117
Electric windows, Convertible
_______ 69
Electrical system, technical data ____ 272
Electrically adjustable seats
________ 18
Electronic Stability Program (ESP)
__ 165
Electronic steering wheel lock
_____ 142
Emergency opening of the narrow
backrest
_____________________ 138
Emergency operation of the sunroof
_ 122
Engine bay, cleaning
____________ 249
Engine heater
__________________ 174
Engine immobilizer
_______________ 47Engine number
_________________ 278
Engine oil, checking
_____________ 196
Engine oil, grade
________________ 270
Engine oil, volume _______________ 271
Engine temperature gauge
_________ 80
Engine, description
______________ 193
Engine, technical data ____________ 270
Engines
_______________________ 271
Event Data Recorder
____________ 266
Extra electrical socket ____________ 126
FFacilitating entry to rear seat,
Convertible
____________________ 65
Factors affecting fuel consumption
__ 173
Filler cap
______________________ 148
Filling up ______________________ 147
Flat spots, tires
_________________ 232
Floor jack
_____________________ 246
Folding down the rear seat
________ 134
Front fog lights
__________________ 93
Front towing eye ________________ 184
Fuel gauge
_____________________ 81
Fuel grade _____________________ 271
Functions, car alarm
______________ 51
Fuse panel in luggage compartment
_225
Fuse table
_____________________ 224
Fuses
________________________ 222
GGDO, garage door opener
_________ 130
Gear selector indicator, automatic
transmission
___________________ 82
Gearbox number ________________ 278
General safety instructions,
Convertible
____________________ 54
Glove compartment
______________ 126
Glove compartment lighting
________ 219
HHandbrake
_____________________ 167
Hazard warning lights
_____________ 94
Head restraint, Convertible
_________ 66
Head restraints
__________________ 20
Headlight flasher _________________ 92
Headlight levelling ________________ 91
Headlights
______________________ 91
Heated door mirrors
_____________ 102
Hood
_________________________ 192
Horn __________________________ 116
Horn button
____________________ 116
IIf a tire goes flat
_________________ 237
Ignition switch
__________________ 140
Immobilizer
_____________________ 47
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