Subaru WRX & WRX STI Manuals 2012 Impreza WRX & WRX STI Owner's Manual | Page 419

& Fuel:

GAS STATION REFERENCE
& Fuel octane rating:

! Turbo models except STI
Use premium unleaded gasoline with an octane rating of 91
AKI (95 RON) or higher. If premium unleaded gasoline with an
octane rating of 91 AKI (95 RON) is not available, regular
unleaded gasoline with octane rating of 87 AKI (90 RON) 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 (95
RON) or higher.
! STI
The engine is designed to operate at maximum performance
using unleaded gasoline with an octane rating of 93 AKI (98
RON) or higher. If 93 AKI (98 RON) fuel is not readily available
in your area, unleaded gasoline with an octane