Recommended shifting speeds
Subaru Impreza / Subaru Impreza Owners Manual / Starting and operating / Manual transmission – 5 speeds (except 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:
To enter the passive mode
If you wish to program the passive arming mode, have it done by your SUBARU dealer. ...
Tachometer
The tachometer shows the engine speed in thousands of revolutions per minute.
Do not operate the engine with the pointer of the tachometer in the red zone. This may cause severe damage to the eng ...
Forward and backward adjustment
Pull the lever upward and slide the seat to the desired position. Then release
the lever and try to move the seat back and forth to make sure that it is securely
locked into place. ...
