2005 SUBARU IMPREZA WRX fuel

11 - 4 8
Maintenance and service
not pressed against the curb when you park the
vehicle.y
If you feel unusual vibration while driving or find
it difficult to steer the vehicle in a straight line, one
of the tires and/or wheels may be damaged. Drive
slowly to the nearest authorized SUBARU dealer
and have the vehicle inspected. „ Tire pressures and wear
Maintaining the correct tire pressures helps to maxi-
mize the tires’ service lives and is essential for good
running performance. Check and, if necessary, adjust
the pressure of each tire (including the spare) at least
once a month (for example, during a fuel stop) and be-
fore any long journey. Check the tire pressures when the tires are cold. Use
a pressure gauge to adjust the tire pressures to the
values shown on the tire placard. The tire placard is lo-
cated on the door pillar on the driver’s side.
Driving even a short distance warms up the tires and
increases the tire pressures. Also, the tire pressures
are affected by the outside temperature. It is best to
check tire pressure outdoors before driving the vehi- cle.
When a tire becomes warm, the air inside it expands,
causing the tire pressure to increase. Be careful not to
mistakenly release air from a warm tire to reduce itspressure.
UGB510BA

11 -4 9
Maintenance and service
– CONTINUED –
NOTE yThe air pressure in a tire increases by approxi-
mately 4.3 psi (30 kPa, 0.3 kgf/cm 2
) when the tire
becomes warm. y The tires are considered cold when the vehicle
has been parked for at least three hours or has
been driven less than one mile (1.6 km).
Do not let air out of warm tires to adjust pres-
sure. Doing so will result in low tire pressure.
Incorrect tire pressures detract from controllability and
ride comfort, and they cause the tires to wear abnor-
mally. y
Correct tire pressure (tread worn evenly)
Roadholding is good, and steering is responsive. Roll-
ing resistance is low, so fuel consumption is also low-er.
HSB052AA

11 - 5 0
Maintenance and service
y
Abnormally low tire pressure (tread worn at
shoulders)
Rolling resistance is high, so fuel consumption is also
higher. y
Abnormally high tire pressure (tread worn in cen-
ter)
Ride comfort is poor. Also, the tire magnifies the ef-
fects of road-surface bumps and dips, possibly result-
ing in vehicle damage.
If the tire placard shows tire pressures for the vehicle
when fully loaded and for the vehicle when towing a
trailer, adjust the tire pressures to the values that
match current loading conditions.
Driving at high speeds with excessively low tire
pressures can cause the tires to deform severe-
HSB053AAHSB054AA

11 - 5 6
Maintenance and service
Windshield washer fluid
Check the level of the washer fluid at each fuel stop. If
the level is low, fill the fluid up to the neck of the reser- voir.
Use windshield washer fluid. If windshield washer fluid
is unavailable use clean water.
In areas where water freezes in winter, use an anti-
freeze type windshield washer fluid. SUBARU Wind-
shield Washer Fluid contains 58.5% methyl alcohol
and 41.5% surfactant, by volume. Its freezing temper-
ature varies according to how much it is diluted, as in-
dicated in the following table.
Never use engine coolant as washer fluid be-
cause it could cause paint damage.
UGB134HA
Washer Fluid Concentration Freezing Temperature
30% 10.4 °F (–12 °C)
50% –4 °F (–20 °C)
100% –49 °F (–45 °C)

12-4
Specifications „
Capacities
AT: Automatic transmission
MT: Manual transmission
Fuel tank15.9 US gal (60 liters, 13.2 Imp gal)
Engine oil4.2 US qt (4.0 liters, 3.5 Imp qt)
Transmission oil (MT)5 speed3.7 US qt (3.5 liters, 3.1 Imp qt)
6 speed4.3 US qt (4.1 liters, 3.6 Imp qt)
Transmission oil (AT)10.0 US qt (9.5 liters, 8.4 Imp qt)
Power steering gear fluid0.7 US qt (0.7 liter, 0.6 Imp qt)
Engine coolant2.5-liter non-turbo engineMT7.4 US qt (7.0 liters, 6.2 Imp qt)
AT7.3 US qt (6.9 liters, 6.1 Imp qt)
2.0-liter turbo engineMT8.1 US qt (7.7 liters, 6.8 Imp qt)
AT8.0 US qt (7.6 liters, 6.7 Imp qt)
2.5-liter turbo engineMT8.1 US qt (7.7 liters, 6.8 Imp qt)

12-11
Specifications
– CONTINUED –
Vehicle identification
2
1
7 6
9 8
4
3
5
UGC013BB
1) Vehicle identification number
2) Vacuum hose connections la-bel/Emission control label
3) Tire inflation pressure label
4) Certification plate
5) Bar cord label (U.S. only)
6) Vehicle identification number
plate
7) Model number plate
8) Radio noise label (Canada only)
9) Fuel label

14-5
Index
Seatbelt pretensioners .................................. 1-28
Seats .............................................................. 1-2
Turn signal light .......................................... 11-73
Fuel ..................................................................... 7-2
Economy hints ................................................ 8-2
Filler lid and cap ............................................. 7-4
Gauge .................................................. 3-10, 3-17
Requirements ................................................. 7-2
Fuses ............................................................... 11-65
Fuses and circuits ............................................. 12-7 G
GAWR (Gross Axle Weight Rating) ................... 8-19
Glove box ............................................................ 6-5
GVWR (Gross Vehicle Weight Rating) .............. 8-19 H
Hazard warning flasher ....................................... 3-7
Head restraint adjustment (Front) ........................ 1-5
Headlight beam leveler ...................................... 3-34
Headlight flasher ............................................... 3-31
Headlight indicator light ..................................... 3-28
Headlights .............................................. 3-30, 11-70
Headrest adjustment (Wagon) ........................... 1-11
Heater operation .................................................. 4-6
High beam indicator light ................................... 3-27
High mount stop light ....................................... 11-83 Horn ................................................................... 3-51
Hose and connections ..................................... 11-19 I
Ignition switch ...................................................... 3-3
Illuminated entry ................................................ 2-11
Illumination brightness control ........................... 3-33
Immobilizer .......................................................... 2-3
Indicator light
High beam .................................................... 3-27
Selector lever position .................................. 3-27
Turn signal .................................................... 3-27
Inside mirror ...................................................... 3-45
Intercooler water spray .................................... 11-55 Switch ........................................................... 3-44
Warning light ................................................. 3-26
Interior light .......................................................... 6-2
Internal trunk lid release handle ........................ 2-28 J
Jack and jack handle ......................................... 9-24
Jump starting ..................................................... 9-13 K Key Interlock release ............................................. 3-6

GAS STATION REFERENCE
Fuel: T2.5-liter non-turbo models
Use only unleaded gasoline with an octane rating of 87 AKI
or higher. T 2.0-liter turbo models
Use premium unleaded gasoline with an octane rating of 91
AKI or higher. If premium unleaded gasoline is not avail-
able, regular unleaded gasoline with octane rating of 87
AKI or higher may be temporarily used. For optimum en-
gine performance and driveability, it is required that you
use premium grade unleaded gasoline. T 2.5-liter turbo models
Use premium unleaded gasoline with an octane rating of 93
AKI or higher. If premium unleaded gasoline with an octane
rating of 93 AKI is not available, premium unleaded gaso-
line with octane rating of 91 AKI or higher may be tempo-
rarily used. For optimum engine performance and driveabil- ity, it is required that you use premium grade unleaded gas-
oline with an octane rating of 93 AKI or higher. „
Fuel octane rating
This octane rating is the average of the Research Octane
and Motor Octane numbers and is commonly referred to as
the Anti Knock Index (AKI). Refer to “ Fuel” section in this
manual. Fuel capacity:
15.9 US gal (60 liters, 13.2 Imp gal) Engine oil:
Use only API classification SL with the words “ENERGY
CONSERVING” and the New API certification mark (star-
burst mark) displayed on the container. Engine oil capacity:
4.2 US qt (4.0 liters, 3.5 Imp qt)
Cold tire pressure:
*1: The recommended cold tire pressure for the 215/45R17 87W tire is not indicated on the vehicle placard attached to the
driver’s side B-pillar since this tire is a dealer option for the WRX. If your vehicle is equipped with 215/45R17 87W tires, be
sure to adjust them to the air pressure shown on this page.
ItemRS, RS sport package, WRXWRX (option tire) *1WRX-STi
Tire sizeP205/55R16 89V215/45R17 87W225/45R17 90W
Wheel size16
× 6 1
/2 JJ17
× 7 JJ17 × 8 JJ
PressureFront32 psi (220 kPa, 2.2 kgf/cm 2
)33 psi (230 kPa, 2.3 kgf/cm 2
)36 psi (250 kPa, 2.5 kgf/cm 2
)
Rear29 psi (200 kPa, 2.0 kgf/cm 2
)32 psi (220 kPa, 2.2 kgf/cm 2
)30 psi (210 kPa, 2.1 kgf/cm 2
)
Temporary
spare tireSizeT135/70 D16T135/70 D17
Pressure60 psi (420 kPa, 4.2 kgf/cm 2
)