Demanding driving

In demanding driving conditions, such as operating the vehicle in hot weather, towing a trailer, or driving for extended periods at higher altitudes than normal, it may be advisable to switch to higher octane fuel (91 or higher) or to change gasoline brands to fully utilize your engine's capacity, and for the smoothest possible operation.
NOTE
When switching to higher octane fuel or changing gasoline brands, it may be necessary to fill the tank more than once before a difference in engine operation is noticeable.
See also:
Functions
NOTE
If a warning message appears while you are using the trip computer, this message
must be acknowledged in order to return to the trip computer function. Acknowledge
a message by pressing ...
Fuel requirements
Octane rating
Minimum octane
Typical pump octane label
Volvo recommends premium for best performance,
but using 87 octane1 or above will not
affect engine reliability.
Volvo engines are desi ...
Changing coolant
Normally, the coolant does not need to be
changed. If the system must be drained, consult
a trained and qualified Volvo service technician.
Do not top off with water only. This reduces the
rust- ...
