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:
Engine specifications
Charge air cooler (Intercooler)
Turbocharged engines employ a turbo-compressor
to force air into the engine inlet manifold
and a charge air cooler to cool the compressed
inlet air. The resulting ...
Coolant
Location of the coolant reservoir
Normally, the coolant does not need to be
changed. If the system must be drained, consult
a trained and qualified Volvo service technician.
See page 357 for i ...
Checking the engine oil
The oil level should be checked at regular intervals,
particularly during the period up to the
first scheduled maintenance service.
• See page 356 for oil specifications.
• Refer to the Warranty ...
