SI-DRIVE (STI)
SI-DRIVE (SUBARU Intelligent Drive) works to maximize engine performance, control and efficiency.
This system consists of three modes:
Intelligent (I), Sport (S), and Sport Sharp (S#). By adjusting the SI-DRIVE selector, the character of the power unit changes.
See also:
Turbo models
The engine is designed to operate using
premium unleaded gasoline with an
octane rating of 91 AKI (95 RON) or
higher. If premium unleaded gasoline is
not available, regular unleaded gasoline
...
Recommended spark plugs
Refer to “Electrical system” F12-8. ...
Recommended grade and viscosity
Each oil manufacturer has its own base oils and additives. Never use different
brands together. For details, refer to “Manual transmission, front differential
and rear differential gear oil” F12-6 ...