6.2 Fuels and lubricants
6.2.1 Engine oil
6.2.1.1
General
Modern diesel engines put high demands on the lubrication oil
used. The engine powers that have continuously increased over
the past few years lead to higher thermal loads for the lubrication
oil. Apart from that, the lubrication oil is additionally loaded by con-
tamination because of the reduced lubrication oil consumption and
the prolonged lubrication oil change intervals.
For this reason it is necessary to follow the requirements and rec-
ommendations in these operating instructions in order not to
reduce the lifetime of the engine.
Engine oils of the same specification can generally be mixed
among each other. However, mixing of engine oil should be
avoided, because the poorest characteristics of a mixture will
always prevail.
The use of additives for lubrication oils is not permitted.
The lubrication oil quality has a considerable influence on the life-
time, performance and thus the economy of the engine. The fol-
lowing is generally valid: the better the lubrication oil quality, the
better its properties.
6.2.1.2
Oil quality
Lubrication oils are classified according to their performance and
quality class.
The following lubrication oil specifications are permitted:
n
API CD/CE/CF/CF-4/CG-4 or higher quality
n
ACEA B2/E2 or higher quality
6.2.1.3
Oil viscosity
Since lubrication oil changes its viscosity with the temperature, the
ambient temperature at the operating location of the engine is of
utmost importance when choosing the viscosity class (SAE-class).
Optimal operating conditions can be achieved by using the oil vis-
cosity chart as a reference.
6.2.1.4
Oil change intervals
Annually or every 250 operating hours.
Fig. 39
Maintenance – Fuels and lubricants
BPR 50/55 D / BPR 60/65 D
50
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