2003-10:1 © Scania Industrial & Marine Engines 57
Temperature dependence of diesel fuel
At temperatures lower than those specified for the diesel fuel, paraffin wax
may precipitate from the fuel and block filters and pipes. The engine can then
lose power or stop.
The diesel fuel is adapted for use in the specific climate of each country. If a
vehicle or an engine is to be operated in a temperature zone with lower
temperature than normal, first identify the temperature properties of the
fuel concerned.
The properties of the fuel when cold can be improved by adopting one of the
following measures before the temperature drops:
- If the fuel concerned cannot cope with the expected temperatures, and
diesel fuel is not available with the correct temperature properties, we
recommend that an electric fuel heater is installed as a preventative
measure.
- The low temperature properties of diesel fuel may be improved by
adding kerosene as a preventative measure. A maximum of 20% may
be added. When refuelling, the kerosene should be added first, so that it
mixes thoroughly with the diesel fuel.
Note: It is prohibited to use kerosene in engine fuel in
some countries.
- To prevent water in the fuel from freezing and forming ice, a maximum
of 0.5-2% alcohol (isopropanol) may be added.
Drain fuel tanks and drain or change fuel filters regularly.
It is not permitted to mix
kerosene with diesel fuel that is
already adapted for the climate
concerned. The injection pump
may be damaged. All use of
paraffin other than kerosene is
forbidden, as it causes engine
damage.
It is not permissible to mix
petrol with diesel fuel. In the
long term, petrol may cause
wear to the injection pump and
at worst it may also cause
damage to the engine.
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