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:
Use cleaning agents and car care products recommended by Volvo. Clean regularly
and treat stains immediately.
A lightly dampened microfiber cloth is recommended for cleaning interior details
and surfaces. These cloths are available for purchase at Volvo retailers...
The driver can choose different drive modes to determine how driver support
should maintain a time interval to the vehicle ahead.
Settings are made using the DRIVE MODE controls.
Select one of the following:
Eco - Driver support will focus on providing good fuel economy, which
will increase the time interval to the vehicle ahead...