Volvo V50 Owner's Manual page 275

11 Specifications
Fuel
Diesel
Diesel must fulfil the EN 590 or JIS K2204
standards.
Diesel engines are sensitive to contaminants,
such as excessively high volumes of sulphur
particles for example. Only use diesel fuel from
11
well-known producers. Never use diesel of
dubious quality.
At low temperatures (-40 °C to -6 °C), a paraffin
precipitate may form in the diesel fuel, which
can lead to ignition problems. Special diesel
fuel designed for low temperatures around
freezing point is available from the major oil
companies. This fuel is less viscous at low tem-
peratures and reduces the risk of paraffin pre-
cipitate.
The risk of condensation in the fuel tank is
reduced if the tank is kept well filled. When
refuelling, check that the area around the fuel
filler pipe is clean. Avoid spilling fuel onto the
paintwork. Wash off any spillage with deter-
gent and water.
IMPORTANT
Only ever use fuel that fulfils the European
diesel standard.
1 Diesel fuel may contain a certain amount of RME, but further amounts must not be added.
274
IMPORTANT
Diesel type fuels which must not be used:
special additives, Marine Diesel Fuel, fuel
1
oil, RME (Rape Methyl Ester) and vegetable
oil. These fuels do not fulfil the requirements
in accordance with Volvo recommendations
and generate increased wear and engine
damage that is not covered by the Volvo
warranty.
IMPORTANT
For model year 2006 or later the sulphur
content must be a maximum of 50 ppm.
Empty tank
No special procedures are required if the tank
runs dry. The fuel system is bled automatically
if the ignition switch is kept in position II for
approx. 60 seconds before the start attempt.
Draining condensation from the fuel filter
The fuel filter separates condensation from the
fuel. Condensation can disrupt engine opera-
tion.
The fuel filter must be drained at the intervals
specified in the Service and Warranty Booklet
or if you suspect that the car has been filled
with contaminated fuel.
IMPORTANT
Certain special additives remove the water
separation in the fuel filter.
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. Regener-
ation normally takes between 10 and 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