See also:

Materials Added To Engine Oil
Do not add any supplemental materials, other than leak detection dyes, to the engine oil. Engine oil is an engineered product and its performance may be impaired by supplemental additives. ...

Winter Operation
Use of the air Recirculation Mode during winter months is not recommended because it may cause window fogging. ...

Rear Temperature Control
The rear mode selection REAR, allows the settings to be controlled by the rear mode control knob. To change the temperature in the rear of the vehicle, rotate the temperature control knob counter ...