Recommended shifting speeds
Subaru Impreza / Subaru Impreza Owners Manual / Starting and operating / Manual transmission – 6 speeds (STI) / Shifting speeds / Recommended shifting speeds

The best compromise between fuel economy and vehicle performance during normal driving is ensured by shifting up at the speeds listed in the following table.
See also:
Key lock-in prevention function
This function prevents the doors from being locked with the key still in the
ignition switch. ...
Cargo
The Impreza hatchback has 19 cubic feet of cargo room behind the backseat,
which is more than the four-door GTI (14.7) but less than the Vibe (20.1). The
cargo floor isn't especially deep, as a go ...
Security ID plate
Security ID plate
1) Key number plate
2) Security ID plate
The security ID is stamped on the security
ID plate attached to the key set. Write
down the security ID and keep it in
another sa ...
