engine SUBARU WRX 2016 Owners Manual

& Engine Model
STI Except STI
Engine model EJ257
(2.5 L, DOHC, turbo) FA20
(2.0 L, DOHC, turbo)
Engine type Horizontally opposed, liquid cooled 4 cylinder, 4-stroke petrol engine
Displacement cu-in (cc) 150 (2,457) 122 (1,998)
Bore 6 Stroke in (mm) 3.92 6 3.11 (99.5 6 79.0) 3.39 6 3.39 (86.0 6 86.0)
Compression ratio 8.2 : 1 10.6 : 1
Firing order 1 – 3 – 2 – 4
& Fuel
NOTE The engine is designed to operate using unleaded gasoline.
Model Fuel Fuel tank capacity
STI
93 AKI (98 RON) or higher * 1
15.9 US gal (60 liters, 13.2 Imp gal)
Except STI
91 AKI (95 RON) or higher * 2
*1: If unleaded gasoline with an octane rating of 93 AKI (98 RON) is not available, unleaded gasoline with an octane rating of 91 AKI (95 RON) may be
used with no detriment to engine durability or driveability.
*2: If unleaded gasoline with an octane rating of 91 AKI (95 RON) is not available, unleaded gasoline with an octane rating of 87 AKI (90 RON) or higher
may be used. Specifications/Specifications
– CONTINUED –12-3

Specifications/Specifications
& Engine oilFor the checking, adding and replacing procedure or other details, refer to “ Engine oil ” F 11-13.
NOTE The procedure for changing 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.
! Oil filterModel STI Except STI
Oil filter color Black Black
Part number 15208AA100 15208AA170
Amount of rotation 1 rotation 3/4 rotation
! Approved engine oil
Always use the SUBARU approved engine oil. For further details, please contact your SUBARU dealer.
If the approved engine oil is unavailable, use the alternative engine oil described on the next page.12-4

! Alternative engine oil
If the SUBARU approved oil is unavailable, the following alternative oil can be used.
NOTE . Each quantity indicated here is only a guideline. The necessary quantity for replacement may differ slightly depending on
the temperature and other factors.
. In choosing an oil, you want the proper quality and viscosity, as well as one that will enhance 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. 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.
Oil grade SAE viscosity No. and
applicable temperature Engine oil capacity
API (American Petroleum Insti-
tute) classification SN with the
words “ RESOURCE CONSER-
VING ” or
ILSAC (International Lubricant
Specification Advisory Commit-
tee) GF-5 , which can be identi-
fied with the ILSAC certification
mark (Starburst mark) 5W-30 synthetic oil is the required oil
for optimum engine performance and
protection. Conventional oil may be
used if synthetic oil is unavailable.
*: If 5W-30 synthetic oil is not available,
5W-40 conventional oil may be used if
replenishment is needed but should be
changed to 5W-30 synthetic oil at the
next oil change. STI:
· Adding the oil from L to F level:
1.1 US qt (1.0 liter, 0.9 Imp qt)
· Changing the oil and oil filter:
4.5 US qt (4.3 liters, 3.8 Imp qt)
· Changing the oil:
4.2 US qt (4.0 liters, 3.5 Imp qt)
Except STI:
· Adding the oil from L to F level:
1.1 US qt (1.0 liter, 0.9 Imp qt)
· Changing the oil and oil filter:
5.4 US qt (5.1 liters, 4.5 Imp qt)
· Changing the oil:
5.2 US qt (4.9 liters, 4.3 Imp qt)Specifications/Specifications
– CONTINUED –12-5

*4: You may use this type of manual transmission oil. However, using this type of oil will detract from driveability and fuel efficiency.
& Fluids Fluid
Fluid type* 1
Fluid capacity* 2
Remarks* 3
Continuously variable transmission
fluid (CVT models) Consult your SUBARU dealer. 13.1 US qt (12.4 liters, 10.9 Imp qt) “ Continuously variable trans-
mission fluid ” F 11-23
Brake fluid FMVSS No. 116, fresh DOT 3 or DOT 4
brake fluid –“ Brake fluid ” F 11-25
Clutch fluid (MT models) FMVSS No. 116, fresh DOT 3 or DOT 4
brake fluid – “ Clutch fluid (MT models) ” F 11 -
26
Power steering fluid (STI) · SUBARU ATF
· “ Dexron III ” Type Automatic Transmis-
sion Fluid
· IDEMITSU ATF HP 0.7 US qt (0.7 liter, 0.6 Imp qt) “ Power steering fluid (STI) ”
F 11-24
*1: Use one of the indicated types of fluid.
*2: The indicated fluid quantity is only a guideline. The necessary quantity for replacement may differ slightly depending on the temperature and other
factors.
*3: For more details about maintenance and service, refer to the indicated section.
& Engine coolant Vehicle model Coolant capacity Coolant type
STI 8.2 US qt (7.7 liters, 6.8 Imp qt)
SUBARU Super Coolant
Except STI MT models 8.7 US qt (8.2 liters, 7.2 Imp qt)
CVT models 8.9 US qt (8.4 liters, 7.4 Imp qt)
The indicated coolant quantity is only a guideline. The necessary quantity for replacement may differ slightly depending on the temperature and other
factors. For more details about maintenance and service, refer to “ Cooling system ” F 11-17. Specifications/Specifications
– CONTINUED –12-7

Specifications/Fuses and circuits
Fuses and circuits & Fuse panel located in the passenger compartment Fuse
panel Fuse
rating Circuit
1 20A
(Not available)
2 7.5A
. Combination meter
3 15A
. Door locking
4 10A
. Front wiper deicer relay
5 Empty
6 7.5A
. Remote control rear
view mirrors
. Seat heater relay
7 10A
. Combination meter
. Integrated unit
8 7.5A
. Stop light
9 7.5A
. Front wiper deicer
10 7.5A
. Power supply (battery)
11 7.5A
. Turn signal unit
12 15A
. Transmission control
unit
. Engine control unit
. Integrated unit
13 20A
. Accessory power outlet
(center console)
14 10A
. Parking light
. Tail light
. Rear combination light12-10

Specifications/Fuses and circuits
& Fuse panel located in the engine compartment! STI
A) Main fuse Fuse
panel Fuse
rating Circuit
1 30A
. ABS unit
. Vehicle Dynamics Con-
trol unit
2 25A
. Main fan (cooling fan)
3 25A
. Sub fan (cooling fan)
4
Empty
5
25A
. Audio
6
30A
. Headlight (low beam)
7
15A
. Headlight (high beam)
8 20A
. Back-up
9 15A
. Horn
10 25A
. Rear window defogger
. Mirror heater
11 15A
. Fuel pump
12 10A
. Transmission control
unit
13 7.5A
. Engine control unit
14 15A
. Turn and hazard warn-
ing flasher
15 15A
. Tail and illumination re-
lay
16 7.5A
. Alternator12-12

Specifications/Fuses and circuits
! Except STI
A) Main fuse Fuse
panel Fuse
rating Circuit
1 30A
. ABS unit
. Vehicle Dynamics Con-
trol unit
2 25A
. Main fan (cooling fan)
3 25A
. Sub fan (cooling fan)
4
Empty
5
25A
. Audio
6
30A
. Headlight (low beam)
7
15A
. Headlight (high beam)
8 20A
. Back-up
9 15A
. Horn
10 25A
. Rear window defogger
. Mirror heater
11 15A
. Fuel pump
12 20A
. Transmission control
unit
13 7.5A
. Engine control unit
14 15A
. Turn and hazard warn-
ing flasher
15 15A
. Tail and illumination re-
lay
16 7.5A
. Alternator12-14

crease in temperature could cause
tread separation, and failure of the
tire(s). Possible resulting loss of
vehicle control could lead to an
accident. ! Measuring and adjusting air
pressure to achieve proper in-
flation
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 pressures.
Also, the tire pressures are affected
by the outside temperature. It is
best to check tire pressure out-
doors 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 .
Accessory weight
The combined weight (in excess of
those standard items which may be
replaced) of automatic transmis-
sion, power steering, power brakes,
power windows, power seats, radio,
and heater, to the extent that these
items are available as factory-in-
stalled equipment (whether in-
stalled or not). .
Bead
The part of the tire that is made of
steel wires, wrapped or reinforced
by ply cords and that is shaped to fit
the rim. .
Bead separation
A breakdown of the bond between
components in the bead. .
Bias ply tire
A pneumatic tire in which the ply
cords that extend to the beads are
laid at alternate angles substantially
less than 90 degrees to the center-
line of the tread.
.
Carcass
The tire structure, except tread and sidewall rubber which, when in-
flated, bears the load. .
Chunking
The breaking away of pieces of the
tread or sidewall. .
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. .
Cord
The strands forming the plies in the
tire. .
Cord separation
The parting of cords from adjacent
rubber compounds. .
Cracking
Any parting within the tread, side-
wall, or inner liner of the tire
extending to cord material. .
Curb weight
The weight of a motor vehicle with
standard equipment including the
maximum capacity of fuel, oil and
coolant, and if so equipped, air
conditioning and additional weight
optional engine.Consumer information and Reporting safety defects/Tire information
– CONTINUED –13-5

Booster ........................................................ 7-35, 11-27
Disc ..................................................................... 12-9
Fluid ............................................................ 11-25, 12-7
Pad and lining ...................................................... 11-30
Parking ........................................................ 7-44, 11-30
Pedal .................................................................. 11-27
System ................................................................. 7-35
Brake pedal
Free play ............................................................. 11-27
Reserve distance .................................................. 11-28
Brake system ............................................................ 7-35
Warning light ......................................................... 3-21
Braking ..................................................................... 7-35
Tips...................................................................... 7-35
Breaking-in of new brake pads and linings ................... 11-30
BSD/RCTA ................................................................ 7-56
BSD/RCTA approach indicator light/warning buzzer .... 7-59
BSD/RCTA OFF switch ........................................... 7-61
BSD/RCTA warning indicator ................................... 7-60
Bulb
Chart .................................................................. 12-16
Replacing ............................................................. 11-44
C
Catalytic converter ....................................................... 8-3
Center
Console .................................................................. 6-5
Changing
Coolant ................................................................ 11-19
Flat tire ................................................................... 9-4
Oil and oil filter ..................................................... 11-15 Charge warning light ................................................... 3-17
CHECK ENGINE warning light/Malfunction indicator
light ....................................................................... 3-16
Checking
Brake pedal free play ............................................ 11-27
Brake pedal reserve distance ................................. 11-28
Clutch function ..................................................... 11-28
Clutch pedal free play ........................................... 11-28
Coolant level ........................................................ 11-18
Fluid level (brake fluid) .......................................... 11-25
Fluid level (clutch fluid) .......................................... 11-26
Fluid level (power steering fluid) ............................. 11-24
Fluid level (washer fluid) ........................................ 11-38
Oil level (engine oil) .............................................. 11-13
Child restraint systems ................................................ 1-21
Installation of a booster seat .................................... 1-28
Installation with ALR/ELR seatbelt ............................ 1-24
Lower and tether anchorages ................................... 1-29
Top tether anchorages ............................................ 1-32
Child safety ................................................................... 4
Locks .................................................................... 2-32
Chime
Key........................................................................ 3-5
Light ..................................................................... 3-94
Seatbelt. ................................................................ 3-14
Cigarette lighter ........................................................... 6-9
Cleaning
Aluminum
wheels ................................................... 10-3
Interior .................................................................. 10-5
Ventilation grille ....................................................... 4-9
Climate control system ................................................. 4-3 Index
14-3

Warning ........................................................ 3-22, 7-48
Emergency Locking Retractor (ELR) ............................. 1-13
Engine
Compartment overview .......................................... 11-11
Coolant ........................................................ 11-18, 12-7
Exhaust gas (carbon monoxide) ............................. 5, 8-2
Hood .................................................................... 11-9
Low oil level warning light ....................................... 3-17
Oil............................................................... 11-13, 12-4
Overheating .......................................................... 9-11
Starting & stopping ........................................... 7-9, 7-12
Event data recorder ......................................................... 8
Exterior care .............................................................. 10-2
F
Flat tires ..................................................................... 9-4
Floor mat .................................................................. 6-10
Fluid level
Brake .................................................................. 11-25
Clutch .................................................................. 11-26
Continuously variable transmission .......................... 11-23
Power steering ..................................................... 11-24
Fog light ................................................................... 3-99
Bulb .......................................................... 11-47, 12-16
Indicator light ......................................................... 3-35
Switch .................................................................. 3-99
Front
Differential gear oil ........................................ 11-23, 12-6
Fog light ...................................................... 3-99, 11-47
Fog light indicator light ............................................ 3-35
Seatbelt pretensioners ............................................ 1-17 Front fog light ............................................................. 3-99
Switch ................................................................... 3-99
Front seats ................................................................. 1-2
Forward and backward adjustment ............................ 1-4
Head restraint adjustment ......................................... 1-5
Power seat ............................................................. 1-5
Reclining ................................................................ 1-4
Seat height adjustment (driver ’ s seat) ........................ 1-4
Fuel ........................................................................... 7-3
Consumption indicator ..................................... 3-52, 3-54
Economy hints ........................................................ 8-2
Filler lid and cap ...................................................... 7-5
Gauge ................................................................... 3-10
Requirements ................................................. 7-3, 12-3
Fuses ..................................................................... 11-42
Fuses and circuits .................................................... 12-10
G
GAWR (Gross Axle Weight Rating) .. ............................. 8-12
Glove box ................................................................... 6-5
GVWR (Gross Vehicle Weight Rating) ........................... 8-12
H
Hazard warning flasher .......................................... 3-8, 9-2
Head restraint adjustment
Front seat ............................................................... 1-5
Rear
seat ............................................................... 1-8
Headlight
Beam leveler. ......................................................... 3-99
Bulb replacement ................................................. 11-44
Bulb replacing ...................................................... 11-44 Index
14-5