SHOP MANUAL
Engine
Ch 1 page 44
Environmentally favourable fuels (low sulphur fuels)
There are three classes of so called environmentally favourable fuels (SS15 54 35).
Class 1 is sulphur-free and class 2 is low in sulphur. Compared with class 3 (normal fuel), these fuels are less
dense and this reduces engine power output.
Temperature dependency of the Fuel
At temperatures lower than those specified for the fuel, paraffin
wax may precipitate from the fuel and block filters and pipes.
The engine can then lose power or stop.
The 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 a temperature lower than normal, first
identify the temperature properties of that particular fuel.
The properties of the fuel when cold can be improved by
adopting one of the following measures before the temperature
drops:
• Install an electric fuel heater if this particular fuel is not
suitable for the expected temperature, and no fuel is
available with the correct temperature properties.
• Add 0.5 - 2% alcohol (isopropanol) to prevent any water in
the fuel from freezing and forming plugs of ice. Drain fuel
tanks and drain or renew fuel filters regularly.
Mixing kerosene or other parafns with the fuel is
prohibited. The injectors may be damaged.
Mixing petrol with the fuel is prohibited. In the
long term petrol can cause wear in the injectors
and engine.
NOTE
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