2010 SUBARU LEGACY maintenance

11-14Maintenance and service
&Changing the oil and oil filter
Change 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.
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.
2.5 L non-turbo models
2.5 L turbo models
3.6 L models
4. 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 and around
the drain plug with a clean cloth and
tighten it securely with a new sealing
washer after the oil has completely
drained out.
2.5 L non-turbo models

2.5 L turbo models
3.6 L models
6. Remove the oil filter with an oil filter wrench.
7. Before installing a new oil filter, apply a
thin coat of engine oil to the seal. 8. 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.
9. Tighten the oil filter by the amount
indicated in the following table after the
seal makes contact with the bottom ofengine.
Model Oil filter
color Part
number Amount of
rotation
2.5 L models Black 15208AA100 1 rotation
Blue 15208AA12A 7/8
rotation
3.6 L models Black 15208AA031 3/4
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 left unremoved, the oil could
catch fire.
10. Reinstall the cover under the oil filter.
11. Pour engine oil through the filler neck. Oil capacity (guideline):
2.5 L models: 4.2 US qt (4.0 liters, 3.5 Imp qt)
3.6 L models: 6.7 US qt (6.3 liters, 5.5 Imp qt)
The oil quantity indicated above is only a
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 tempera-
ture 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.
12. Start the engine and make sure that no
oil leaks appear around the filter ’s rubber
seal and drain plug.
13. Keep the engine idling until the engine
reaches the normal operating temperature
range, as indicated by the temperature
gauge on the combination meter. After
that, check the engine oil level again. For
further details about the check procedure,
refer to “Checking the oil level ”F 11-12.
Maintenance and service
11-15
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11-16Maintenance and service
&Recommended grade and viscosity
CAUTION
Use only engine oil with the recom-
mended grade and viscosity.
Oil grade: –ILSAC GF-4, which can be identified
with the ILSAC certification mark (Star-
burst mark) – or API classification SM with the words
“ ENERGY CONSERVING ”
These recommended oil grades can be
identified by looking for either or both of
the following marks displayed on the oil
container.
ILSAC Certification Mark (Starburst Mark)
API Service label
1) Indicates the oil quality by API designa- tions
2) Indicates the SAE oil viscosity grade
3) Indicates that the oil has fuel saving capabilities In choosing an oil, you want the proper
quality and viscosity, as well as one that
will add to fuel economy. The following
table lists the recommended viscosities
and applicable temperatures.
When adding oil, different brands may be
used together as long as they are the
same API classification and SAE viscosity
as those recommended by SUBARU.
SAE viscosity numb
er and applicable
temperature
*: 5W-30 is preferred.
Engine 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 engine.

&Recommended grade and
viscosity under severe driv-
ing conditions
If the vehicle is used in desert areas, in
areas with very high temperatures, or
used for heavy-duty applications such as
towing a trailer, use of oil with the following
grade and viscosities is recommended.
API classification SM or SL: SAE viscosity No.:30, 40, 10W-50, 20W-40, 20W-50 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 isremoved.
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 off 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 shortened to that of the mixingcoolant.
. 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- nections
Your 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 coolant temperature high
warning light illuminates, the cooling fan
circuit may be defective. Check the fuse
and replace it if necessary. Refer to“ Fuses ”F 11-48 and “Fuses and circuits ”
F 12-6. 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. Maintenance and service
11-17
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11-18Maintenance and service
&Engine coolant
! Checking the coolant level
Check 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.
3. After refilling the reserve tank and the
radiator, reinstall the caps and check that
the rubber gaskets inside the radiator cap
are in the proper position.
CAUTION
. Be careful not to spill engine
coolant when adding it. If coolant
touches the exhaust pipe, it may
cause a bad smell, smoke, and/or
a fire. If engine coolant gets on
the exhaust pipe, be sure to wipe
it off.
. Do not splash the engine coolant
over painted parts. The alcohol
contained in the engine coolant
may damage the paint surface. !
Changing the coolant
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 isremoved.
Always add genuine SUBARU cooling
system conditioner whenever the coolant
is replaced.
Change the engine coolant and add
genuine SUBARU cooling system condi-
tioner using the following procedures
according to the maintenance schedule
in the “Warranty and Maintenance Book-
let ”.

1. Remove the under cover.
2.5 L models
1) Drain plug
3.6 L models
1) Drain plug
2. Place a proper container under the drain plug and loosen the drain plug.
3. Loosen the radiator cap to drain the
coolant from the radiator. Then drain the
coolant from the reserve tank. Tighten the
drain plug securely.
4. Install the under cover.
1) Fill up to here
5. Slowly pour the coolant and fill up to
just below the filler neck, allowing enough
room to add genuine SUBARU cooling
system conditioner in the radiator. Add
genuine SUBARU cooling system condi-
tioner until the coolant level reaches the
filler neck. Do not pour the coolant too
quickly, as this may lead to insufficient air
bleeding and trapped air in the system. Coolant capacity (guideline):
2.5 L non-turbo models:MT: 6.9 US qt (6.5 liters, 5.7 Imp qt)
CVT: 6.8 US qt (6.4 liters, 5.6 Imp qt)
2.5 L turbo models: 6.9 US qt (6.5 liters, 5.7 Imp qt)
3.6 L models: 6.9 US qt (6.5 liters, 5.7 Imp qt)
CAUTION
. Be careful not to spill engine
coolant when adding it. If coolant
touches the exhaust pipe, it may
cause a bad smell, smoke, and/or
a fire. If engine coolant gets on
the exhaust pipe, be sure to wipe
it off.
. Do not splash the engine coolant
over painted parts. The alcohol
contained in the engine coolant
may damage the paint surface. Maintenance and service
11-19
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11-20Maintenance and service
6. Pour the coolant and fill to the reser-
voir tank’s “FULL ”level mark.
7. Put the radiator cap back on and
tighten firmly. At this time, make sure that
the rubber gasket in the radiator cap is
correctly in place. 8. Start and race the engine at 2,000 to
3,000 rpm for 5 to 6 times within 40seconds.
9. Stop the engine and wait until the
coolant cools down (122 to 140
8F [50 to
60 8C]). If there is any loss of coolant, add
coolant to the radiator ’s filler neck and to
the reserve tank ’s “FULL ”level.
10. Put the radiator cap and reservoir cap
back on and tighten firmly. Air cleaner element
WARNING
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.
CAUTION
When replacing the air cleaner ele-
ment, use a genuine SUBARU air
cleaner element. If it is not used,
there is the possibility of causing a
negative effect to the engine.
The air cleaner element functions as a
filter screen. When the element is perfo-
rated or removed, engine wear will be
excessive and engine life shortened.
The air cleaner element is a dry type. It is
unnecessary to clean or wash the ele-ment.

&Replacing the air cleaner element
Replace the air cleaner element according
to the maintenance schedule in the“ Warranty and Maintenance Booklet ”. Un-
der extremely dusty conditions, replace it
more frequently. It is recommended that
you always use genuine SUBARU parts. ! Non-turbo models
1. Remove the air intake duct (except 3.6
L models). For the method to remove the
air intake duct, refer to “Removing air
intake duct ”F 11-7.
1) Connector
2) Clamp
3) Clips
2. Unplug the connector that is attached to the top of the air cleaner case.
3. Loosen the screw of the clamp.
4. Unsnap the two clips holding the air
cleaner case cover.
5. Open the air cleaner case cover and
remove the air cleaner element.
6. Clean the inside of the air cleaner
cover and case with a damp cloth and
install a new air cleaner element.
7. To install the air cleaner case cover,
insert the three projections on the air
cleaner case cover into the slits on the
air cleaner case and then snap the two
clips on the air cleaner case cover.
Maintenance and service
11-21
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