Subaru Outback 2011 Owner's Manual page 494

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Fuel:
! Non-turbo petrol engine models
! Australia models
Use only unleaded petrol with 90 Octane or higher. This
octane rating is the Research Octane number. For optimum
engine performance and driveability, it is recommended that
you use premium grade unleaded petrol.
! Other models
Use only unleaded petrol. The use of unleaded petrol with 95
Octane or higher is recommended. This octane rating is the
Research Octane number. If unleaded petrol with 95 Octane or
higher is not available, unleaded petrol with 90 Octane or higher
may be used.
! Turbo petrol engine models
Use only unleaded petrol with 95 Octane or higher. This
octane rating is the Research Octane number. If unleaded
petrol with 95 Octane or higher is not readily available in your
area, refer to "Fuel requirements for petrol engine" F7-2.
! Diesel engine models
Use only diesel fuel with a specification of EN590 or an
equivalent.
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Fuel capacity:
65 liters (17.2 US gal, 14.3 Imp gal)
GAS STATION REFERENCE
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! Petrol engine
Use only the following oils.
. API classification SM or SN with the words "ENERGY
CONSERVING" or "RESOURCE CONSERVING"
. or ILSAC GF-4 or GF-5, which can be identified with the
ILSAC certification mark (Starburst mark)
. or ACEA specification A3 or A5
For the complete viscosity requirements, refer to "Petrol engine
models" F12-6.
! Diesel engine
Use only ACEA specification C2 or C3.
For the complete viscosity requirements, refer to "Diesel engine
models" F12-7.
Engine oil: