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:

2009 Subaru Outback review
A longtime Cars.com favorite, the Subaru Outback remains a versatile, desirable model whose greatest shortcoming is that it's no longer unique. Along with competing wagons like the Volvo V50 and X ...

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”. ...

The Ultimate Performance Subaru
The 2011 WRX STI continues as the ultimate-performance Subaru with its high-boost 305-hp turbocharged/intercooled 4-cyl. Boxer engine and 6-speed manual transmission. The STI also features Multi-M ...