2006 SUBARU IMPREZA oil viscosity

11
Maintenance and service
Maintenance schedule ....................................... 11-3
Maintenance precautions ........................... ....... 11-3
Before checking or servicing in the engine compartment ....................................... ................. 11-4
When you do checking or servicing in the engine
compartment while the engine is running ......... 11 -4
Engine hood ....................................... ................ 11-4
Engine compartment overview ....................... .. 11-6
Non-turbo models .................................. ................. 11-6
Turbo models ...................................... .................... 11-7
Engine oil ........................................ .................... 11-8
Checking the oil level ............................ ................. 11-8
Changing the oil and oil filter ................... ............. 11-8
Recommended grade and viscosity ................... .. 11-10
Recommended grade and viscosity under severe driving conditions ......................... ........... 11-11
Synthetic oil ..................................... ....................... 11-11
Cooling system .................................... .............. 11-12
Cooling fan, hose and connections ................. ..... 11-12
Engine coolant .................................... .................... 11-12
Air cleaner element ............................... ............. 11-15
Replacing the air cleaner element ................. ........ 11-15
Spark plugs ....................................... .................. 11-17
Recommended spark plugs ........................... ........ 11-17
Drive belts ....................................... .................... 11-18
Manual transmission oil ........................... ......... 11-18
Checking the oil level ............................ ................. 11-18
Recommended grade and viscosity ................... .. 11-19Automatic transmission fluid ......................
...... 11-20
Checking the fluid level .......................... ................ 11-20
Recommended fluid ................................. .............. 11-21
Front differential gear oil (AT vehicles) ......... ... 11-21
Checking the oil level ............................ ................. 11-21
Recommended grade and viscosity ................... .. 11-22
Rear differential gear oil ........................ ............ 11-22
Checking the gear oil level ....................... ............. 11-22
Recommended grade and viscosity ................... .. 11-23
Power steering fluid .............................. ............. 11-24
Checking the fluid level .......................... ................ 11-24
Recommended fluid ................................. .............. 11-24
Brake fluid ....................................... .................... 11-25
Checking the fluid level .......................... ................ 11-25
Recommended brake fluid ........................... .......... 11-25
Clutch fluid (MT vehicles) ........................ .......... 11-26
Checking the fluid level .......................... ................ 11-26
Recommended clutch fluid .......................... .......... 11-26
Brake booster ..................................... ................ 11-27
Brake pedal ....................................... .................. 11-27
Checking the brake pedal free play ................ ...... 11-27
Checking the brake pedal reserve distance ......... 11-27
Clutch pedal (MT vehicles) ........................ ........ 11-28
Checking the clutch function ...................... .......... 11-28
Checking the clutch pedal free play ............... ...... 11-28
Replacement of brake pad and lining ............... 11-28
Breaking-in of new brake pads and linings ......... . 11-29
Parking brake stroke .............................. ............ 11-29

11-8 Maintenance and service
Engine oil
Checking the oil level
Check the engine oil level at each fuel
stop.
1. Park the vehicle on a level surface and
stop the engine.
2. Pull out the dipstick, wipe it clean, and
insert it again.
3. Be sure the dipstick is correctly insert-
ed until it stops with the graphic
symbol on its top appearing as
shown in the illustration.
1) Notch
2) Upper level
3) Lower level
4. Pull out the dipstick again and check
the oil level on it. If it is below the lower
level, add oil to bring the level up to the up-
per level.
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 lev-
el when the engine is cold.
Changing the oil and oil filter
Change the oil and oil filter according to
the maintenance schedule in the “Warran-
ty 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 frequent-
ly made, or when driving in extremely cold
whether.
1. Warm up the engine by letting the en-
gine 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.
B00467
Use only engine oil with the rec-
ommended grade and viscosity.
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 en-
gine oil gets on the exhaust pipe,
be sure to wipe it off.
1 2
3
B00418

11-10 Maintenance and service
11.Reinstall under cover.
12.Pour engine oil through the filler neck.
Oil capacity (guideline):
4.2 US qt (4.0 liters, 3.5 Imp qt)
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 the dipstick 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 nor-
mal 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.
Recommended grade and
viscosity
Oil grade:
ILSAC GF-4, which can be identified
with the ILSAC certification mark
(Starburst 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.
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 ca- pabilities
Oil filter color Part number
Amount of ro-
tation
Black 15208AA100 1 rotation
White 15208AA09A 2/3
– 3/4 rota-
tion
Never over tighten the oil filter be-
cause that can result in an oil leak.
Thoroughly wipe off any engine
oil that has spilled over the ex-
haust pipe and/or under-cover. If
left unremoved, the oil could
catch fire.
Be careful not to spill engine oil
when adding it. If oil touches the ex-
haust pipe, it may cause a bad smell,
smoke, and/or a fire.
APISERVICES
NERGYCONRVING
SAE
5W-30
1
2
3
B00446

Maintenance and service 11-11
ILSAC Certification Mark (Starburst
Mark)
In choosing an oil, you want the proper
quality and viscosity, as well as one that
will add to fuel economy. The following ta-
ble 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 No. and applicable tem-
perature
*: 5W-30 is recommended.
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 ar- eas with very high temperatures, or used
for heavy-duty applications such as tow-
ing 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
Synthetic oil
You can use synthetic engine oil that
meets the same requirements given for
conventional engine oil. When using syn-
thetic oil, you must use oil of the same
classification, viscosity and grade shown
in this owner ’s manual, and must follow
the oil and filter changing intervals shown
in the maintenance schedule.B00014
Use only engine oil with the recom-
mended grade and viscosity.
B00522
5W-30*
10W-30, 10W-40
-30 -20 -10 0 10 20 30 40
-20 0 60 20 80 10040

Maintenance and service 11-19
5-speed transmission (Turbo model)
6-speed transmission
1. Park the vehicle on a level surface and
stop the engine. 2. Pull out the dipstick, wipe it clean, and
insert it again.
1) Upper level
2) Lower level
3. Pull out the dipstick again and check
the oil level on it. If it is below the lower
level, add oil through the dipstick hole to
bring the level up to the upper level.
Recommended grade and
viscosity
Each oil manufacturer has its own base
oils and additives. Never use different
brands together.
Oil grade:
API classification GL-5
SAE viscosity No. and applicable tem-
perature
B00469
B00470
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.
L F
F
L1
2 1
2
B00368
-30 -20 -10 0 10 20 30 40-20 0 60 20
80W
75W/90 80 100
40
85W 90
B00032

11-22 Maintenance and service
Recommended grade and
viscosity
Each oil manufacturer has its own base
oils and additives. Never use different
brands together.
Oil grade:
API classification GL-5
SAE viscosity No. and applicable tem-
perature
Rear differential gear oil
Checking the gear oil level
Your vehicle may be equipped with a rear
differential protector. The differential pro-
tector provides protection to the rear dif-
ferential assembly during off-road use.
Removal of the rear differential protector
is not required when checking the oil level.
1) Filler plug
2) Drain plug 1) Filler hole
2) Drain hole
3) Oil level
Remove the plug from the filler hole and
check the oil level. The oil level should be
kept even with the bottom of the filler hole.
If the oil level is below the bottom edge of
the hole, add oil through the filler hole to
raise the level.
-30 -20 -10 0 10 20 30 40
-20 0 60 20
80W
75W/90 80 100
40
85W 90
B00032
2 1B00373
3
1
2
B00434

Maintenance and service 11-23
Recommended grade and
viscosity
Each oil manufacturer has its own base
oils and additives. Never use different
brands together.
Oil grade:
API classification GL-5 SAE viscosity No. and applicable tem-
perature
Except STI version
SAE viscosity No. and applicable tem-
perature
STI version
Be careful not to spill rear differ-
ential gear oil when adding it. If
rear differential gear oil touches
the exhaust pipe, it may cause a
bad smell, smoke, and/or a fire. If
rear differential gear oil gets on
the exhaust pipe, be sure to wipe
it off.
If the vehicle requires frequent re-
filling, there may be an oil leak. If
you suspect a problem, have the
vehicle checked at your SUBARU
dealer.
-30 -20 -10 0 10 20 30 40
-20 0 60 20
80W
75W/90 80 100
40
85W 90
B00032
-30 -20 -10 0 10 20 30 40
-20 0 60 20 80 10040
90
B00159

14-6 Index
Off road driving ................................... ................................ 8-6
Oil filter ........................................ ..................................... 11-8
Oil level Engine ............................................ ............................. 11-8
Front differential (AT vehicles) ..................... .............. 11-21
Manual transmission ................................. ................. 11-18
Rear differential ................................. ........................ 11-22
Oil pressure warning light .......................... ....................... 3-16
Outside mirrors ..................................... ............................ 3-33
Outside temperature indicator ....................... ............ 3-9, 3-13
Overheating engine ................................. ......................... 9-11
P
Parking Brake .............................................. ............................. 7-25
Brake stroke ......................................... ..................... 11-29
Light switch ........................................ .......................... 3-25
Tips ............................................... ............................... 7-25
Periodic inspections .................................. ......................... 8-4
Power Door locking switches ................................. ................... 2-6
Steering .......................................... ............................. 7-21
Steering fluid .................................... ......................... 11-24
Windows ........................................... ........................... 2-18
Preparing to drive ................................. .............................. 7-6
Printed antenna ................................... ............................... 5-2
R
Rear Combination lights ................................. .................... 11-48
Differential gear oil ............................. ........................ 11-22Differential oil temperature warning light ........
.............. 3-17
Gate .............................................. ............................... 2-23
Seats .............................................. ................................ 1-6
Rear seat Folding down (Wagon) .............................. ..................... 1-8
Rear window Defogger button ................................... ........................ 3-29
Wiper and washer switch ............................. ................ 3-28
Recommended Automatic transmission fluid .......................... ............ 11-21
Brake fluid ........................................ .......................... 11-25
Clutch fluid ....................................... .......................... 11-26
Oil grade and viscosity .............................. ..... 11-10, 11-11,
11-19, 11-22, 11-23
Power steering fluid ............................... .................... 11-24
Spark plugs ......................................... ....................... 11-17
Remote keyless entry system .............................. ............... 2-7
Replacement Brake pad and lining ............................... ................... 11-28
Wiper blades ....................................... ....................... 11-37
Replacing Air cleaner element ................................ .................... 11-15
Battery (Remote keyless entry system) ..................... .... 2-9
Lost transmitters (keyless entry system) ................. ..... 2-10
Replacing bulbs ..................................... ......................... 11-44
Cargo area light .................................. ....................... 11-50
Dome light ........................................ .......................... 11-50
Front fog light ................................... .......................... 11-48
Front turn signal light ............................ ..................... 11-48
Headlights ......................................... ......................... 11-45
High mount stop light .............................. ................... 11-51
License plate light ................................. ..................... 11-50