To change the cruising speed

See also:

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”. ...

CVT models
There is no oil level gauge. To check the front differential gear oil level, we recommend that you consult your SUBARU dealer for inspection. ...

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 ...