2011 SUBARU IMPREZA WRX STI Owners Manual

Black plate (367,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
Engine compartment overview& Non-turbo models
1) Power steering fluid reservoir
(page 11-24)
2) Manual transmission oil level gauge (MT) (page 11-21) or Differential gear oil level
gauge (AT) (page 11-23)
3) Clutch fluid reservoir (page 11-26)
4) Automatic transmission fluid level gauge (AT) (page 11-22)
5) Brake fluid reservoir (page 11-25)
6) Fuse box (page 11-45)
7) Battery (page 11-44)
8) Windshield washer tank (page 11-38)
9) Engine oil filler cap (page 11-10)
10) Engine coolant reservoir (page 11-14)
11) Radiator cap (page 11-14)
12) Engine oil level gauge (page 11-10)
13) Air cleaner case (page 11-17) Maintenance and service
11-7
–
CONTINUED –
11

Black plate (368,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
11-8
Maintenance and service
& Turbo models except STI
1) Power steering fluid reservoir
(page 11-24)
2) Manual transmission oil level gauge (MT) (page 11-21)
3) Clutch fluid reservoir (page 11-26)
4) Brake fluid reservoir (page 11-25)
5) Fuse box (page 11-45)
6) Battery (page 11-44)
7) Windshield washer tank (page 11-38)
8) Engine oil filler cap (page 11-10)
9) Engine coolant reservoir (page 11-14)
10) Engine oil level gauge (page 11-10)
11) Radiator cap (page 11-14)
12) Air cleaner case (page 11-17)

Black plate (369,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
& STI
1) Power steering fluid reservoir
(page 11-24)
2) Clutch fluid reservoir (page 11-26)
3) Brake fluid reservoir (page 11-25)
4) Fuse box (page 11-45)
5) Battery (page 11-44)
6) Windshield washer tank (page 11-38)
7) Engine oil filler cap (page 11-10)
8) Engine coolant reservoir (page 11-14)
9) Engine oil level gauge (page 11-10)
10) Radiator cap (page 11-14)
11) Air cleaner case (page 11-17) Maintenance and service
11-9
11

Black plate (370,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
11-10
Maintenance and service
Engine oilNOTE. The engine oil consumption rate is
not stabilized, and therefore cannot be
determined until the vehicle has tra-
veled at least several thousand miles
(kilometers). Even after break-in, when
the vehicle is used under severe driv-
ing conditions such as those men-
tionedintheWarrantyandMainte-
nance Booklet, engine oil is consumed
or deteriorated more quickly than un-
der normal driving conditions. If you
drive your vehicle under these severe
conditions, you should check the oil
level at least at every second fuel fill-up
time, and change the oil more fre-
quently. Please refer to the Warranty
and Maintenance Booklet for more de-
tails.
. If the oil consumption rate seems
abnormally high after the break-in
period, for example more than 1 quart
per 1,200 miles or 1 liter per 2,000
kilometers, contact your SUBARU deal-
er.
& Checking the oil levelCheck the engine oil level at each fuel
stop.
1. Park the vehicle on a level surface and
stop the engine.2. Pull out the level gauge that has the
“
”symbol on top, wipe it clean, and
insert it again.
3. Be sure the level gauge is correctly
inserted until it stops.
1) Notch
2) Upper level
3) Lower level4. Pull out the level gauge again and
check the oil level on it. If it is below the
lower level, add oil to bring the level up to
the upper level.
CAUTION
. Use only engine oil with the
recommended grade and vis-
cosity.
. 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. If
engine oil gets on the exhaust

Black plate (371,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
pipe, be sure to wipe it off.
. If the level gauge is not pulled out
easily, twist the level gauge right
and left, then pull it out. Other-
wise, you may be injured acci-
dentally straining yourself.
If you check the oil level just after stopping
the engine, wait a few minutes for the oil to
drain back into the oil pan before checking
the level.
Just after driving or while the engine is
warm, the engine oil level reading may be
in a range between the upper level and
the notch mark. This is caused by thermal
expansion of the engine oil.
To prevent overfilling the engine oil, do not
add any additional oil above the upper
level when the engine is cold.
& Changing the oil and oil filterChange the oil and oil filter according to
the maintenance schedule in the “War-
ranty and Maintenance Booklet ”.
The engine oil and oil filter must be
changed more frequently than listed in
the maintenance schedule when driving
on dusty roads, when short trips are
frequently made, or when driving in
extremely cold weather.
NOTEChanging the engine oil and oil filter
should be performed by a properly-
trained expert. It is recommended that
you have this service performed by
your SUBARU dealer.
1. Warm up the engine by letting the
engine idle for approximately 10 minutes
to ease draining the engine oil.
2. Park the vehicle on a level surface and
stop the engine.
3. Remove the oil filler cap.Turbo models
Non-turbo models4. Drain out the engine oil by removing
the drain plug while the engine is still
warm. The used oil should be drained into
an appropriate container and disposed of
properly.
WARNING
Be careful not to burn yourself with
hot engine oil.
5. Wipe the seating surface of the drain
plug with a clean cloth and tighten it
securely with a new sealing washer after
the oil has completely drained out.
6. Remove the under cover.
Maintenance and service
11-11
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11

Black plate (372,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
11-12
Maintenance and service
Turbo modelsNon-turbo models7. Remove the oil filter with an oil filter
wrench.
8. Before installing a new oil filter, apply a
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.

Black plate (373,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
& 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 required engine oil for optimum engine perfor-
mance. Conventional oil may be used if
synthetic oil is unavailable.
Cooling system
WARNING
Never attempt to remove the radia-
tor cap until the engine has been
shut off and has cooled down
completely. Since the coolant is
under pressure, you may suffer
serious burns from a spray of boil-
ing hot coolant when the cap is
removed.
CAUTION
.
Vehicles are filled at the factory
with SUBARU Super Coolant that
does not require the first change
for 11 years/137,500 miles (11
years/220,000 km). This coolant
should not be mixed with any
other brand or type of coolant
during this period. Mixing with a
different coolant will reduce the
life of the coolant. Should it be
necessary to top up the coolant
for any reason, use only
SUBARU Super Coolant.
If the SUBARU Super Coolant is
diluted with another brand or
type, the maintenance interval is
Maintenance and service
11-13
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11

Black plate (374,1)
北米Model "A1110BE-C" EDITED: 2010/ 12/ 17
11-14
Maintenance and service
shortened to that of the mixing
coolant.
. Do not splash the engine coolant
over painted parts. The alcohol
contained in the engine coolant
may damage the paint surface.
& Cooling fan, hose and con-
nectionsYour vehicle employs an electric cooling
fan which is thermostatically controlled to
operate when the engine coolant reaches
a specific temperature.
If the radiator cooling fan does not operate
even when the following conditions occur,
the cooling fan circuit may be defective.
. For turbo models, the engine coolant
temperature gauge exceeds the normal
operating range. Refer to “Temperature
gauge (turbo models) ”F 3-11.
. For non-turbo models, the coolant
temperature high warning light blinks or
illuminates in RED. Refer to “Coolant
temperature low indicator light (non-turbo
models)/Coolant temperature high warn-
ing light (non-turbo models) ”F 3-17.
Check the fuse and replace it if necessary.
Refer to “Fuses”F 11-45 and “Fuse panel
located in the engine compartment” F12-
14. If the fuse is not blown, have the cooling
system checked by your SUBARU dealer.
If frequent addition of coolant is neces-
sary, there may be a leak in the engine
cooling system. It is recommended that
the cooling system and connections be
checked for leaks, damage, or looseness.
&
Engine coolant! Checking the coolant level
WARNING
Never attempt to remove the radia-
tor cap until the engine has been
shut off and has cooled down
completely. Since the coolant is
under pressure, you may suffer
serious burns from a spray of boil-
ing hot coolant when the cap is
removed.
1) “FULL ”level mark
2) “LOW ”level markCheck the coolant level at each fuel stop.
1. Check the coolant level on the outside
of the reservoir while the engine is cool.
2. If the level is close to or lower than the
“LOW ”level mark, add coolant up to the
“FULL ”level mark. If the reserve tank is
empty, remove the radiator cap and refill
as required.