Volvo XC90: Specifications / Transmission fluid specifications
Under normal driving conditions, the transmission fluid will not need to be
changed during the transmission's service life. However, it may need to be changed
if the vehicle is driven frequently in adverse driving conditions.

Engine oil of type VCC RBS0-2AE 0W-20 must be used. Lower oil grades may not
offer the same fuel economy, engine performance or engine protection.
Volvo recommends:
General
See the Service and warranty booklet for information about oil change intervals...
The medium in the hydraulic brake system is called brake fluid and is used
to transfer pressure from e.g. a brake pedal via a master brake cylinder, which
in turn actuates the brake calipers...
Other information:
It may not always be desirable to store settings made in the vehicle to the
active driver profile. In these instances, the driver profile can be protected.
NOTE
Protecting a driver profile is only possible when the vehicle is stationary.
To protect a driver profile:
Tap Settings in the Top view in the center display...
Bright light entering the vehicle from behind, e.g. from the headlights of
following vehicles, could reflect in the rearview mirror and door mirrors and cause
a glare. Use the dimming function when light from behind is distracting.
Auto-dim
If bright light enters the vehicle from behind, the door mirrors will automatically
dim when it is dark outside or when lighting conditions are low, for exa..