OPM 250 en-GB 64
©
Scania CV AB 2016, Sweden
Diesel
Diesel
Composition of the fuel
The composition of the fuel is extremely impor-
tant for the operation and service life of the en-
gine and injection system. The engine output and
exhaust gases are also dependent on the fuel
grade.
The requirements and testing standards for the
most important characteristics are described in
the Workshop Manual which can be ordered
from Scania dealers or directly from Scania.
The fuel must conform to EU standard EN590.
The table shows some of the key properties.
Property Requirement
Viscosity at 40°C
(104°F)
2.0-4.5 cSt
Density at 15°C (59°F) 0.82-0.86 cSt
Ignitability (CET rating) minimum 49
Flashpoint 56°C (132°F)
Sulphur content of fuel
The machine operator is responsible for using
the correct type of fuel to ensure that local laws
are complied with.
• A sulphur content of 0-2,000 ppm in the fuel
(0.2%) gives an oil change interval of up to
500 hours.
• With a sulphur content of 2,000-4,000 ppm in
the fuel, the oil change interval is halved to
max. 250 hours.
• Maximum permitted sulphur content in the
fuel is 4,000 ppm.
Using DMX and DMA fuels in
marine engines
DMX and DMA fuels normally cause increased
wear on the injection system. As a result of the
high sulphur content in these fuels the engine oil
is also affected. The engine oil must have as high
a Total Base Number (TBN) as possible.
For engines running on DMX and DMA fuels the
engine oil must have a TBN of at least 12.
When the engine is taken into operation the en-
gine oil must be analysed every 50 hours to de-
termine the correct oil change interval. The oil
analysis must be carried out according to the Oil
analysis section in this Operator's manual.
Bear in mind that the emission limit for the cur-
rent engine type may limit the maximum permit-
ted sulphur content of the fuel.
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