Recommended grade and viscosity
Subaru Impreza / Subaru Impreza Owners Manual / Maintenance and service / Engine oil / Recommended grade and viscosity

Use only engine oil with the recommended grade and viscosity.
Refer to “Engine oil”.
NOTE
Engine oil viscosity (thickness) affects fuel economy. Oils of lower viscosity provide better fuel economy. However, in hot weather, oil of higher viscosity is required to properly lubricate the engine.
See also:
Warning and indicator lights
...
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. ...
Driving on grades
● Before going down a steep hill, slow down and shift into lower gear (if necessary,
use 1st gear) in order to utilize the overheating of your vehicle’s brakes. Do not
make sudden downshifts ...
