MAN B&W L28/32H, Manual

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08028-0D/H5250/94.08.12
1609531-8.3
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Lubricating Oil Specification
General
01.02
Requirement
This document is valid for the following engine types:
L16/24, L21/31, L23/30H, L27/38, L28/32H, V28/
32H.
For the engines, a HD-lub. oil (heavy duty) corre-
sponding to at least type CD Comercial Class D after
API service system (meets MIL-L-2104 C and D) has
to be used.
The oil should be rust and oxidation inhibited.
When selecting a lubricating oil, attention must be
paid to the fuel oil sulphur content.
Due to generating running mode for HOLEBY's
engines, where the lub. oil consumption depends on
running time and the fuel oil consumption and follow-
ing the sulphur input to the lub. oil depends on the
load, a lower TBN-value (Total Base Number) than
normal for main engines is needed.
Viscosity
Engine SAE class
L23/30H, L+V28/32H
30* 105 mm
2
/sec at 40° C
L16/24, L21/31, L27/38
40 145 mm
2
/sec at 40° C
* At cooling water temperatures above 32° C SAE 40
oil can be used. In this case, please contact MAN
B&W, Holeby.
If load profile is different, this should be taken in
consideration.
In the long run though, the operation results are the
criteria that prove which TBN is the most economical
one for efficient engine operation.
Guiding Values
Based on typical load profile for marine GenSet (50-
60% of rated power)
Oil type TBN TBN TBN
(initial) (equilibrium) (min. level)
Gas oil 8-12 6-8 6
Marine diesel 10-15 8-10 8
Heavy fuel (S<1.5) 10-15 8-10 8
Heavy fuel (1.5<S<2.5) 15-20 10-14 8
Heavy fuel (2.5<S<3.5) 20-25 10-14 8
Heavy fuel (3.5<S<4.5) 20-25 10-14 8
Based on typical load profile for stationary GenSets
(50-100% of rated power)
Oil type TBN TBN TBN
(initial) (equilibrium) (min. level)
Gas oil 8-12 6-8 6
Marine diesel 10-15 8-10 8
Heavy fuel (S<1.5) 15-20 8-10 8
Heavy fuel (1.5<S<2.5) 20-25 10-14 8
Heavy fuel (2.5<S<3.5) 20-30 10-14 8
Heavy fuel (3.5<S<4.5) 20-30 10-14 8
Based on typical load profile for variable speed
engine, pumps (10-100% of rated power)
Oil type TBN TBN TBN
(initial) (equilibrium) (min. level)
Gas oil 10-14 6-8 6
Marine diesel 12-16 8-10 8
Heavy fuel (S<1.5) 15-20 8-10 8
Heavy fuel (1.5<S<2.5) 20-30 10-14 8
Heavy fuel (2.5<S<3.5) 20-30 10-14 8
Heavy fuel (3.5<S<4.5) 25-30 10-14 8