54
© Scania Industrial & Marine Engines
FUEL
Diesel fuel
The composition of the diesel fuel is vitally important to the operation and
life of the engine and the fuel injection pump. The engine power output and
the exhaust emissions are also dependent on the fuel quality.
The requirements and the test standards for the most important properties are
described in the workshop manual in sections that can be ordered from your
Scania dealer or directly from Scania. The address of Scania is printed on the
cover.
The diesel fuel shall comply with the following standard:
EN 590 (European standard).
The table below shows the requirements for some of the most important
properties:
Environmentally favourable fuels (low sulphur fuels)
There are three different grades of so called environmentally favorable fuels
(SS15 54 35). Grade 1 is sulphur-free and grade 2 is low in sulphur.
Compared with class 3 (normal fuel), these fuels are less dense and this
reduces engine power output. Only class 1 fuel should be used with a
catalytic converter.
Short term use of fuel with a higher sulphur content than 0.05% by weight
will not cause permanent damage to the catalytic converter.
The catalytic converter may, however, require fuel with low sulphur content
for some time after this to regain its normal efficiency.
Property
Requirement
Viscosity at 40
°
C
2.0 - 4.5 mm
2
/s (cSt)
Density at 15
°
C
0.82 - 0.86 kg/dm
3
Sulphur (concentration by mass)
max. 0.3%
Ignitability (CET rating)
min. 49
Flashpoint
56°C
Additives must not be used.