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:
Wheel changes must always be carried out correctly. The following instructions
show how to remove and install a wheel and what is important to keep in mind. Make
sure that the tire dimension is approved for use on the vehicle.
WARNING
If a tire must be changed near passing traffic, make sure all passengers
move to a safe location...
The instrument panel displays information related to the vehicle and driving.
The instrument panel contains gauges, indicators and monitoring and warning symbols.
What is shown in the instrument panel varies depending on the equipment, settings
and functions currently active...