Subaru 2007 B9 Tribeca Owner's Manual page 401

Fuel
Use unleaded gasoline with an octane rating of 91 AKI or higher.
Regular unleaded gasoline with an octane rating of 87 AKI or high-
er may be used. However for optimum engine performance and
driveability, it is recommended that you use 91 AKI or higher grade
unleaded gasoline. You may experience reduced output, poor ac-
celerator response, and reduced fuel economy when using gaso-
line with an octane rating lower than 91 AKI, depending on your
driving habits and conditions. If you experience any of these con-
ditions while using a lower octane rated fuel, you may want to re-
turn to using 91 AKI octane rated fuel as soon as possible. Addi-
tionally, if your vehicle knocks heavily or persistently, or if you are
driving with heavy loads such as when towing a trailer, the use of
91 AKI or higher grade unleaded gasoline is required.
Cold tire pressure
Tire size
Wheel size
Pressure
Temporary spare tire
GAS STATION REFERENCE
Front
Rear
Rear at trailer towing
Size
Pressure
Fuel octane rating
This octane rating is the average of the Research Octane and Mo-
tor Octane numbers and is commonly referred to as the Anti Knock
Index (AKI). Refer to "Fuel" section in this manual.
Fuel capacity
16.9 US gal (64 liters, 14.1 Imp gal)
Engine oil
Use only API classification SM with the words "ENERGY CON-
SERVING" and the ILSAC certification mark (starburst mark) dis-
played on the container.
Engine oil capacity
5.8 US qt (5.5 liters, 4.8 Imp qt)
P255/55R18 104H
18 × 8JJ
33 psi (230 kPa, 2.3 kgf/cm
32 psi (220 kPa, 2.2 kgf/cm
32 psi (220 kPa, 2.2 kgf/cm
T165/80R17
60 psi (420 kPa, 4.2 kgf/cm
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