Volvo XC90 Owner's Manual page 131

06 Starting and driving
Refuelling
Fuel cap
A certain overpressure may arise in the tank in
the event of high outside temperatures. Open
the cap slowly.
NOTE
Put the petrol cap back on after refuelling.
Turn until one or more clear clicks are heard.
Filling up with fuel
Do not overfill the tank but fill until the pump
nozzle cuts out.
NOTE
Excess fuel in the tank can overflow in hot
weather.
06
Fuel of a lower quality than that specified
should not be used as engine power and fuel
consumption can be negatively affected, see
page 273.
*
130
Option/accessory, for more information, see Introduction.
WARNING
Fuel which spills onto the ground can be
ignited by the exhaust fumes.
Switch off the fuel-driven heater before star-
ting to refuel.
Never carry an activated mobile phone
when refuelling. The ring signal could cause
spark build-up and ignite petrol fumes,
leading to fire and injury.
Petrol
IMPORTANT
Do not add cleaning additives to the petrol,
unless recommended by Volvo.
Diesel
At low temperatures (–5 °C to –40 °C), a paraffin
precipitate may form in the diesel fuel, which
can lead to ignition problems.
IMPORTANT
Use special winter grade fuel during cold
months.
Diesel particle filter (DPF)*
Diesel cars may be equipped with a particle fil-
ter, which results in more efficient emission
control. The particles in the exhaust gases are
collected in the filter during normal driving. So-
called "regeneration" is started in order to burn
away the particles and empty the filter. This
requires the engine to have reached normal
operating temperature.
Regeneration of the filter takes place automat-
ically at an interval of approximately
300 – 900 km depending on driving conditions.
Regeneration normally takes 10-20 minutes. It
may take a little longer at a low average speed.
Fuel consumption may increase slightly during
regeneration.
The rear window heating may be activated
automatically to increase the load on the
engine during regeneration without warning.
Regeneration in cold weather
If the car is frequently driven short distances in
cold weather then the engine does not reach
normal operating temperature. This means that
regeneration of the diesel particle filter does
not take place and the filter is not emptied.
When the filter has become approximately
80% full of particles, the yellow information
symbol on the instrument panel illuminates,
and the message SOOT FILTER FULL SEE