Engine; Fuel - Subaru WRX-STI Owner's Manual

& Engine
Model
Engine model
Engine type
Displacement cc
Bore 6 Stroke mm (in)
Compression ratio
Firing order
& Fuel
NOTE
Your engine is designed to use only unleaded petrol.
Model
STI
Except STI
*: This octane rating is the Research Octane number.
(2.5 L, DOHC, turbo)
Horizontally opposed, liquid cooled 4 cylinder, 4-stroke petrol engine
99.5 6 79.0
(3.92 6 3.11)
Fuel requirement
98 Octane or higher*
95 Octane or higher*
STI
EJ25
2,457
8.2 : 1
1 3 2
Specifications/Specifications
Except STI
FA20
(2.0 L, DOHC, turbo)
1,998
86.0 6 86.0
(3.39 6 3.39)
10.6 : 1
4
Fuel tank capacity
60 liters (15.9 US gal, 13.2 Imp gal)
– CONTINUED –
12-3