2012 SUBARU IMPREZA WRX STI oil viscosity
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26
Getting
Started Instrument
Panel Gauges
Personalize Controls While
OperatingSafety / In Case
of Emergency Additional
Information
Impreza WRX Engine Compartment
1
1. Power Steering Fluid Reservoir Check your power steering fluid level
monthly. The power steering fluid expands
greatly as its temperature rises and
the fluid level differs according to fluid
temperature. Therefore, the reservoir tank
has two different checking ranges for
hot and cold fluid. Please refer to your
Owner’s Manual for details.
2. Air Cleaner Element This element filters intake air. Follow the
N B J O U F O B O D F H V J E F M J O F T J O Z P V S i 8 B S S B O U Z
B O E . B J O U F O B O D F w C P P L M F U 8 I F O
necessary, replace this element with a
genuine Subaru air cleaner.
3. Radiator Cap If your engine overheats, safely pull off the
road and stop your vehicle in a safe place.
/ F W F S B U U F N Q U U P S F N P W F U I F S B E J B U P S D B Q
until the engine has been shut off and has
fully cooled down. If steam is coming from
the engine compartment, turn the engine
off and move everyone away from the
vehicle until it cools. Please refer to your
Owner’s Manual for details. 4. Intercooler
The intercooler is positioned behind
the throttle body to cool intake air and
improve supercharging efficiency. (Intake
air passing through the turbocharger gets
very warm, which could result in lower
supercharging efficiency.) To prevent
damage to this important system, avoid
placing tools and other objects on
the intercooler.
5. Engine Oil Level Gauge Check the engine oil level at each fuel
stop. Pull out the dipstick, wipe it clean,
and insert it again. Pull it out and check
the oil level. If it’s below the lower level,
add oil to bring the level up to the
upper level. (Use only engine oil of the
recommended grade and viscosity.
Please refer to your Owner’s Manual
for oil recommendations and other
important details.) 6. Engine Coolant Reservoir
Check your coolant level at each
fuel stop. Observe the coolant
level on the outside of the reservoir
while the engine is cool. If the level
J T D M P T F U P o P S M P X F S U I B O o U I F
i - 0 8 w M F W F M N B S L
B E E D P P M B O U U P
U I F i ' 6 - - w M F W F M N B S L * G U I F S F T F S W F
tank is empty, remove the radiator
cap and refill as required. Please
refer to your Owner’s Manual for
details.
7. Engine Oil Filler Cap Change your oil according to
the maintenance schedule in
Z P V S i 8 B S S B O U Z B O E . B J O U F O B O D F
# P P L M F U w : P V S F O H J O F P J M N V T U C F
changed more frequently when you
drive on dusty roads, frequently
make short trips, or when you drive
in extremely cold weather.
8. Brake Fluid Reservoir Check your brake fluid level
monthly. Observe the fluid level on
the outside of the reservoir. If the
M F W F M J T C F M P X U I F i . * / w M F W F M N B S L
add the recommended brake fluid
' . 7 4 4 / P
G S F T I % 0 5 P S
C S B L F þ V J E
U P U I F i . " 9 w M F W F M
mark. Use only brake fluid from
a sealed container.
9. Battery When your vehicle does not start
due to a battery that has run down,
the vehicle may be jump-started by
connecting your battery to another
battery with jumper cables. Jump-starting is dangerous if
done incorrectly. Please refer
to your Owner’s Manual for
instructions. If you’re unsure
about how to jump-start your
vehicle, please consult a
competent mechanic.
10. Windshield Washer Tank It’s a good idea to check your washer fluid every time you stop
for fuel. If the level is low, fill the
windshield washer tank to the
neck of the reservoir with
windshield washer fluid. In cold
weather, use a freeze resistant
windshield washer fluid.
11. Main Fuse Box Your Impreza WRX has two fuse boxes. One is located under the
instrument panel, behind the
fuse box cover on the driver’s
seat side. The other is housed
in your engine compartment, as
shown here. Fuses are designed
to melt during an overload
situation in order to prevent
damage to the wiring harness and
electrical equipment. If any lights,
accessories or electrical controls
fail to operate properly, inspect
the corresponding fuse. If it has
blown, replace it in accordance
with the instructions in your
Owner’s Manual. The fuse puller
and spare fuses are located
in the main fuse box in the
engine compartment.
119
3
8
5
7
10
2
4
6
27
GetGttintigStartedInsItrument PanelGauGgesPerPsonalilizeConCtrotlslWhile OperatingSafSfetyt / /In ICasCeof EmergencyAddAdditiiional lInformation
While
Operating
Page 17 of 463
29
28
Getting
Started Instrument
Panel Gauges
Personalize Controls While
OperatingSafety / In Case
of Emergency Additional
Information
Impreza WRX STI Engine Compartment
1
1. Power Steering Fluid Reservoir Check your power steering fluid level
monthly. The power steering fluid expands
greatly as its temperature rises and
the fluid level differs according to fluid
temperature. Therefore, the reservoir tank
has two different checking ranges for
hot and cold fluid. Please refer to your
Owner’s Manual for details.
2. Air Cleaner Element This element filters intake air. Follow the
N B J O U F O B O D F H V J E F M J O F T J O Z P V S i 8 B S S B O U Z
B O E . B J O U F O B O D F w C P P L M F U 8 I F O
necessary, replace this element with a
genuine Subaru air cleaner.
3. Radiator Cap If your engine overheats, safely pull off the
road and stop your vehicle in a safe place.
/ F W F S B U U F N Q U U P S F N P W F U I F S B E J B U P S D B Q
until the engine has been shut off and has
fully cooled down. If steam is coming from
the engine compartment, turn the engine
off and move everyone away from the
vehicle until it cools. Please refer to your
Owner’s Manual for details. 4. Intercooler
The intercooler is positioned behind
the throttle body to cool intake air and
improve supercharging efficiency. (Intake
air passing through the turbocharger gets
very warm, which could result in lower
supercharging efficiency.) To prevent
damage to this important system, avoid
placing tools and other objects on
the intercooler.
5. Engine Oil Level Gauge Check the engine oil level at each fuel
stop. Pull out the dipstick, wipe it clean,
and insert it again. Pull it out and check
the oil level. If it’s below the lower level,
add oil to bring the level up to the
upper level. (Use only engine oil of the
recommended grade and viscosity.
Please refer to your Owner’s Manual
for oil recommendations and other
important details.) 6. Engine Coolant Reservoir
Check your coolant level at each
fuel stop. Observe the coolant
level on the outside of the reservoir
while the engine is cool. If the level
J T D M P T F U P o P S M P X F S U I B O o U I F
i - 0 8 w M F W F M N B S L
B E E D P P M B O U U P
U I F i ' 6 - - w M F W F M N B S L * G U I F S F T F S W F
tank is empty, remove the radiator
cap and refill as required. Please
refer to your Owner’s Manual for
details.
7. Engine Oil Filler Cap Change your oil according to
the maintenance schedule in
Z P V S i 8 B S S B O U Z B O E . B J O U F O B O D F
# P P L M F U w : P V S F O H J O F P J M N V T U C F
changed more frequently when you
drive on dusty roads, frequently
make short trips, or when you drive
in extremely cold weather.
8. Brake Fluid Reservoir Check your brake fluid level
monthly. Observe the fluid level on
the outside of the reservoir. If the
M F W F M J T C F M P X U I F i . * / w M F W F M N B S L
add the recommended brake fluid
' . 7 4 4 / P
G S F T I % 0 5 P S
C S B L F þ V J E
U P U I F i . " 9 w M F W F M
mark. Use only brake fluid from
a sealed container.
9. Battery When your vehicle does not start
due to a battery that has run down,
the vehicle may be jump-started by
connecting your battery to another
battery with jumper cables. Jump-starting is dangerous if
done incorrectly. Please refer
to your Owner’s Manual for
instructions. If you’re unsure about
how to jump-start your vehicle,
please consult a competent
mechanic.
10. Windshield Washer Tank It’s a good idea to check your washer fluid every time you stop
for fuel. If the level is low, fill the
windshield washer tank to the
neck of the reservoir with
windshield washer fluid. In cold
weather, use a freeze resistant
windshield washer fluid.
11. Main Fuse Box Your Impreza WRX STI has two fuse boxes. One is located under
the instrument panel, behind
the fuse box cover on the driver’s
seat side. The other is housed
in your engine compartment, as
shown here. Fuses are designed
to melt during an overload
situation in order to prevent
damage to the wiring harness and
electrical equipment. If any lights,
accessories or electrical controls
fail to operate properly, inspect
the corresponding fuse. If it has
blown, replace it in accordance
with the instructions in your
Owner’s Manual. The fuse puller
and spare fuses are located in
the main fuse box in the
engine compartment.
11
9
3
8
5
7
10
2
4
6
29
GetGttintigStartedInsItrument PanelGauGgesPerPsonalilizeConCtrotlslWhile OperatingSafSfetyt / /In ICasCeof EmergencyAddAdditiiional lInformation
While
Operating
Page 336 of 463
Black plate (298,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
8-6
Driving tips
Winter driving& Operation during cold
weatherCarry some emergency equipment, such
as a window scraper, a bag of sand,
flares, a small shovel and jumper cables.
Check the battery and cables. Cold
temperatures reduce battery capacity.
The battery must be in good condition to
provide enough power for cold winter
starts.
It normally takes longer to start the engine
in very cold weather conditions. Use an
engine oil of a proper grade and viscosity
for cold weather. Using heavy summer oil
will make it harder to start the engine.
Keep the door locks from freezing by squirting them with deicer or glycerin.
Forcing a frozen door open may damage
or separate the rubber weather strips
around the door. If the door is frozen,
use hot water to melt the ice, and after-
wards thoroughly wipe the water away.
Use a windshield washer fluid that con-
tains an antifreeze solution. Do not use
engine antifreeze or other substitutes
because they may damage the paint of
the vehicle.
SUBARU Windshield Washer Fluid con-
tains 58.5% methyl alcohol and 41.5%
surfactant, by volume. Its freezing tem-
perature varies according to how much it
is diluted, as indicated in the following
table.
Washer Fluid Con-
centration Freezing Temperature
30% 10.4 8F( 12 8C)
50% 48F( 20 8C)
100% 49
8F( 45 8C)In order to prevent freezing of washer
fluid, check the freezing temperatures in
the table above when adjusting the fluid
concentration to the outside temperature.
If you fill the reservoir tank with a fluid with
a different concentration from the one used previously, purge the old fluid from
the piping between the reservoir tank and
washer nozzles by operating the washer
for a certain period of time. Otherwise, if
the concentration of the fluid remaining in
the piping is too low for the outside
temperature, it may freeze and block the
nozzles.
CAUTION
.
Adjust the washer fluid concen-
tration appropriately for the out-
side temperature. If the concen-
tration is inappropriate, sprayed
washer fluid may freeze on the
windshield and obstruct your
view, and the fluid may freeze in
the reservoir tank.
. State or local regulations on
volatile organic compounds may
restrict the use of methanol, a
common windshield washer anti-
freeze additive. Washer fluids
containing non-methanol anti-
freeze agents should be used
only if they provide cold weather
protection without damaging
your vehicle ’s paint, wiper blades
or washer system.
Page 369 of 463
Black plate (21,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 2
Maintenance schedule ....................................... 11-3
Maintenance precautions ................................... 11-3
Before checking or servicing in the engine
compartment .................................................... 11-4
When checking or servicing in the engine compartment .................................................... 11-4
When checking or servicing in the engine compartment while the engine is running .......... 11-5
Engine hood....................................................... 11-5
Engine compartment overview .......................... 11-6
Turbo models except STI.................................... 11-6
STI..................................................................... 11-7
Engine oil ............................................................ 11-8
Checking the oil level ......................................... 11-8
Changing the oil and oil filter .............................. 11-9
Recommended grade and viscosity .................. 11-10
Synthetic oil ..................................................... 11-10
Cooling system ................................................ 11-11
Cooling fan, hose and connections ................... 11-11
Engine coolant ................................................. 11-12
Air cleaner element .......................................... 11-13
Replacing the air cleaner element ..................... 11-13
Spark plugs...................................................... 11-14
Recommended spark plugs .............................. 11-14
Drive belts........................................................ 11-15
Manual transmission oil .................................. 11-15
Checking the oil level....................................... 11-15
Recommended grade and viscosity .................. 11-16
Rear differential gear oil.................................. 11-16
Recommended grade and viscosity .................. 11-16
Power steering fluid........................................ 11-17
Checking the fluid level .................................... 11-17
Recommended fluid ......................................... 11-17
Brake fluid........................................................ 11-18
Checking the fluid level .................................... 11-18
Recommended brake fluid ............................... 11-18
Clutch fluid....................................................... 11-19
Checking the fluid level .................................... 11-19
Recommended clutch fluid ............................... 11-19
Brake booster.................................................. 11-20
Brake pedal ...................................................... 11-20
Checking the brake pedal free play .................. 11-20
Checking the brake pedal reserve distance....... 11-21
Clutch pedal ..................................................... 11-21
Checking the clutch function ............................ 11-21
Checking the clutch pedal free play .................. 11-21
Hill start assist system.................................... 11-22
Replacement of brake pad and lining ............ 11-22
Breaking-in of new brake pads and linings ....... 11-22
Parking brake stroke....................................... 11-23
Tires and wheels .............................................. 11-23
Types of tires................................................... 11-23
Tire pressure monitoring system (TPMS) (if equipped) ...................................................... 11-24
Tire inspection ................................................. 11-25
Tire pressures and wear .................................. 11-25
Wheel balance ................................................. 11-27
Wear indicators ............................................... 11-28
Tire rotation direction mark .............................. 11-28
Tire rotation ..................................................... 11-29
Maintenance and service
11
Page 378 of 463
Black plate (340,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
11-10
Maintenance and service
thin coat of engine oil to the seal.
9. Clean the rubber seal seating area of
the bottom of engine and install the oil
filter by hand turning. Be careful not to
twist or damage the seal.
10. Tighten the oil filter by the amount
indicated in the following table after the
seal makes contact with the bottom of
engine.Oil filter color Part number Amount of
rotation
Black 15208AA100 1 rotation
Blue 15208AA12A 7/8
rotation
CAUTION
. Never over tighten the oil filter
because that can result in an oil
leak.
. Thoroughly wipe off any engine
oil that has spilled over the
exhaust pipe and/or under-cover.
If spilled oil is not promptly
wiped up, the oil could cause a
fire.
11. Reinstall under cover.
12. Pour engine oil through the filler neck.
For the oil capacity (guideline), refer to “Engine oil
”F 12-5.
The oil quantity indicated above is only
guideline.
The necessary quantity of oil depends on
the quantity of oil that has been drained.
The quantity of drained oil differs slightly
depending on the temperature of the oil
and the time the oil is left flowing out. After
refilling the engine with oil, therefore, you
must use the level gauge to confirm that
the level is correct.
13. Start the engine and make sure that no
oil leaks appear around the filter ’s rubber
seal and drain plug.
14. Run the engine until it reaches the
normal operating temperature. Then stop
the engine and wait a few minutes to allow
the oil drain back. Check the oil level
again and if necessary, add more engine
oil.
CAUTION
Be careful not to spill engine oil
when adding it. If oil touches the
exhaust pipe, it may cause a bad
smell, smoke, and/or a fire.
& Recommended grade and
viscosity
CAUTION
Use only engine oil with the recom-
mended grade and viscosity.
Refer to “Engine oil ”F 12-5.NOTEEngine oil viscosity (thickness) affects
fuel economy. Oils of lower viscosity
provide better fuel economy. However,
in hot weather, oil of higher viscosity is
required to properly lubricate the en-
gine.& Synthetic oilYou should use synthetic engine oil that
meets the same requirements given for
conventional engine oil. When using
synthetic oil, you must use oil of the same
classification, viscosity and grade shown
in this Owner ’s Manual. Refer to “Engine
oil ”F 12-5. Also, you must follow the oil
and filter changing intervals shown in the
Warranty and Maintenance booklet.NOTESynthetic oil of the grade and viscosity
noted in chapter 12 is the recom-
Page 384 of 463
Black plate (346,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
11-16
Maintenance and service
1) Upper level
2) Lower level3. Pull out the level gauge again and
check the oil level on it. If it is below the
lower level, add oil through the level
gauge hole to bring the level up to the
upper level.
CAUTION
Be careful not to spill manual trans-
mission oil when adding it. If oil
touches the exhaust pipe, it may
cause a bad smell, smoke, and/or a
fire. If oil gets on the exhaust pipe,
be sure to wipe it off.NOTEThere is no transmission oil level
gauge for STI. Consult your SUBARU
dealer to check the oil level.& Recommended grade and
viscosityEach oil manufacturer has its own base
oils and additives. Never use different
brands together. For details, refer to
“Manual transmission and rear differential
gear oil ”F 12-6.
Rear differential gear oilThere is no rear differential gear oil level
gauge. To check the rear differential gear
oil level, we recommend that you consult
your SUBARU dealer for inspection.& Recommended grade and
viscosityEach oil manufacturer has its own base
oils and additives. Never use different
brands together. For details, refer to
“Manual transmission and rear differential
gear oil ”F 12-6.
Page 421 of 463
Black plate (383,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
& Lubricants
NOTEEach quantity indicated here is only a guideline. The necessary quantity for replacement may differ slightly depending on the
temperature and other factors.
! Engine oil
For checking, adding and replacing procedure, or other details, refer to “Engine oil”F 11-8.
Oil grade SAE viscosity No. and
applicable temperature Engine oil capacity
API classification SM or SN
with the words
“
ENERGY CONSERVING ”or
“ RESOURCE CONSERVING ”or
ILSAC GF-4 or GF-5, which can be
identified with the ILSAC certification
mark (Starburst mark) 5W-30 synthetic
oil is the required oil for
optimum engine performance and pro-
tection. Conventional oil may be used if
synthetic oil is unavailable.
*: 10W-30, 10W-40, 5W-30 or 5W-40
conventional oil may be used if replen-
ishment is needed but should be changed
to 5W-30 synthetic oil at the next oil
change.
· When adding the oil from L to F level:
1.1 US qt (1.0 liter, 0.9
Imp qt)
· When changing the oil and oil filter:
- Except STI:
4.4 US qt (4.2 liters, 3.7
Imp qt)
- STI:
4.5 US qt (4.3 liters, 3.8
Imp qt) Specifications
12-5
–
CONTINUED –
12
Page 422 of 463
Black plate (384,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
12-6
Specifications
! Manual transmission and rear differential gear oil
Oil grade SAE viscosity No. and applicable temperature Applied part and model Oil capacity
API classification GL-5
Manual transmission 5-speed 3.7 US qt (3.5 liters, 3.1 Imp qt)
6-speed 4.3 US qt (4.1 liters, 3.6 Imp qt)
Rear differential STI 1.1 US qt (1.0 liter, 0.9 Imp qt)
Others
0.8 US qt (0.8 liter, 0.7 Imp qt)
For the checking procedures or other details, refer to “Manual transmission oil ”F 11-15 or “Rear differential gear oil ”F 11-16.