2005 SUBARU IMPREZA ECO mode

11 - 2 4
Maintenance and service
Air cleaner element
The air cleaner element functions as a filter screen.
When the element is perforated or removed, engine
wear will be excessive and engine life shortened.
The air cleaner element is a viscous type. It is unnec-
essary to clean or wash the element.
Do not operate the engine with the air cleaner
element removed. The air cleaner element not
only filters intake air but also stops flames if the
engine backfires. If the air cleaner element is
not installed when the engine backfires, you
could be burned.
„ Replacing the air cleaner element
Replace the air cleaner element according to the
maintenance schedule in the “Warranty and Mainte-
nance Booklet”. Under extremely dusty conditions, re-
place it more frequently. It is recommended that you
always use genuine SUBARU parts. T
Non-turbo models
1. Unsnap the two clamps holding the air cleaner
case cover.
UGB092BA

11 - 2 8
Maintenance and service
Spark plugs
It may be difficult to replace the spark plugs. It is rec-
ommended that you have the spark plugs replaced by
your SUBARU dealer.
The spark plugs should be replaced according to the
maintenance schedule in the “Warranty and Mainte-
nance Booklet”.
y
When disconnecting the spark plug cables,
always grasp the spark plug cap, not the ca- bles. y
Make sure the cables are replaced in the cor-
rect order.
„ Recommended spark plugs
2.5-liter non-turbo models:
FR5AP-11
2.0-liter turbo models:
PFR6G (NGK)
2.5-liter turbo models:
IFLR6B (NGK)HSB032BA

13-7
Consumer information and Reporting safety defects
– CONTINUED –
hicle control could lead to an accident. TMeasuring and adjusting air pressure to
achieve proper inflation
Check and, if necessary, adjust the pressure of
each tire (including the spare) at least once a
month and before any long journey. Check the
tire pressures when the tires are cold. Use a
pressure gauge to adjust the tire pressures to the
specific values. Driving even a short distance
warms up the tires and increases the tire pres-
sures. Also, the tire pressures are affected by the
outside temperature. It is best to check tire pres-
sure outdoors before driving the vehicle. 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 its pressure. „ Glossary of tire terminology
y Cold tire pressure
The pressure in a tire that has been driven less
than 1 mile or has been standing for three hours
or more. y Maximum inflation pressure The maximum cold inflation pressure to which a
tire may be inflated. y
Recommended inflation pressure
The cold inflation pressure recommended by a
vehicle manufacturer. y Intended outboard sidewall
1)The sidewall that contains a whitewall, bears
white lettering or bears manufacturer, brand,
and/or model name molding that is higher or
deeper than the same molding on the other
sidewall of the tire, or
2)The outward facing sidewall of an asymmet-
rical tire that has a particular side that must al-
ways face outward when mounting on a vehi- cle.
y Accessory weight
The combined weight (in excess of those stan-
dard items which may be replaced) of floor mats,
leather seats and cross bars to the extent that
these items are available as factory-installed
equipment (whether installed or not). y Curb weight
The weight of a motor vehicle with standard
equipment including the maximum capacity of fu-
el, oil, and coolant and air conditioning.

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
)