Subaru 2007 Impreza-WRX Owner's Manual page 364

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Fuel:
! 2.5-liter non-turbo models
Use only unleaded gasoline with an octane rating of 87 AKI or
higher.
! WRX
Use premium unleaded gasoline with an octane rating of 91 AKI
or higher. If premium unleaded gasoline with an octane rating of
91 AKI is not available, regular unleaded gasoline with octane
rating of 87 AKI or higher may be temporarily used. For
optimum engine performance and driveability, it is required that
you use premium grade unleaded gasoline with an octane
rating of 91 AKI or higher.
! WRX-STI
Use super-premium unleaded gasoline with an octane rating of
93 AKI or higher. If super-premium unleaded gasoline with an
octane rating of 93 AKI is not available, premium unleaded
gasoline with octane rating of 91 AKI or higher may be
temporarily used. For optimum engine performance and
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Cold tire pressure:
Tire size
Wheel size
Pressure
Front
Rear
Temporary
Size
spare tire
Pressure
GAS STATION REFERENCE
P205/55R16 89V
16 6 6 1
/ JJ
2
2
33 psi (230 kPa, 2.3 kgf/cm )
2
30 psi (210 kPa, 2.1 kgf/cm )
T135/70 D16
driveability, it is required that you use super-premium grade
unleaded gasoline with an octane rating of 93 AKI or higher.
&
Fuel octane rating
This octane rating is the average of the Research Octane and
Motor Octane numbers and is commonly referred to as the Anti
Knock Index (AKI). Refer to "Fuel" section in this manual.
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Fuel capacity
15.9 US gal (60 liters, 13.2 Imp gal)
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Engine oil:
Use only API classification SM with the words "ENERGY
CONSERVING" and the ILSAC certification mark (starburst
mark) displayed on the container.
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Engine oil capacity:
4.2 US qt (4.0 liters, 3.5 Imp qt)
215/45R17 91W
17 6 7 JJ
2
33 psi (230 kPa, 2.3 kgf/cm )
2
32 psi (220 kPa, 2.2 kgf/cm )
2
60 psi (420 kPa, 4.2 kgf/cm )
225/45R17 90W
17 6 8 JJ
2
35 psi (240 kPa, 2.4 kgf/cm )
2
29 psi (200 kPa, 2.0 kgf/cm )
T135/70 D17