Operation0750−1/A1
Winterthur Gas & Diesel Ltd.
10/ 18
D Range 1 (see Fig. 1): When the fuel sulphur content is more than 0.1% m/m and
less than 0.5% m/m during operation with BN 15 to BN 25 cylinder lubricating oil,
you must do an analysis of the piston underside drain oil from the on-board
monitoring system. You must obey the data that follows:
D The residual base number must not be less than BN10.
D The iron (Fe) content must be less than 500 ppm.
D Do regular checks of the piston and piston ring conditions through scavenge
port inspections. If necessary, increase the cylinder lubricating oil feed rate
to more than 1.2 g/kWh (refer to 7218-1 Cylinder Lubrication and
7218−3 Feed Rate − Adjustment).
Note: Permitted for engine operation of less than 48 hours only.
D Range 2 (see Fig. 1): When the fuel sulphur content is more than 0.1% m/m and
less than 0.5% m/m during operation with BN 40 cylinder lubricating oil, adjust
the cylinder lubricating oil feed rate to the guide feed rate (refer to 7218-1
Cylinder Lubrication). This prevents too much piston crown and top land
deposits.
Note: Permitted for engine operation of less than 48 hours only.
D Range 3 (see Fig. 1): When the fuel sulphur content is more than 0.5% m/m and
less than 1.0% m/m during operation with BN 70 to BN 80 cylinder lubricating oil,
adjust the cylinder lubricating oil feed rate to the guide feed rate (see 7218-1
Cylinder Lubrication). This prevents too much piston crown and top land
deposits.
Note: Permitted for engine operation of less than 48 hours only.
D Range 4 (see Fig. 1): When the fuel sulphur content is more than 1.5% m/m and
less than 2.0% m/m during operation with BN 100 cylinder lubricating oil, adjust
the cylinder lubricating oil feed rate to the guide feed rate (see 7218-1 Cylinder
Lubrication). This prevents excessive piston crown and top land deposits.
D Range 5 (see Fig. 1): When the fuel sulphur content is more than 2.5% m/m and
less than 3.5% m/m during operation with BN 70 to BN 80 cylinder lubricating oil,
operation is permitted only, when you do an analysis of the piston underside
drain oil from the on-board monitoring system. You must obey the data that
follows:
D Do regular checks of the piston and piston ring conditions through scavenge
port inspections.
D Do regular checks of the cylinder liner condition.
D You must obey the data given in Fig. 2.
Note: From 1
st
January 2015 only fuel with less than 0.1% m/m sulphur content
must be used in Emission Control Areas (ECA). You can use SO
x
scrubbers to reduce the effective exhaust sulphur content. For more data,
see paragraph 7.
Note: Use a BN 100 cylinder lubricating oil, if the fuel sulphur content is more
than 2.5% m/m and no piston underside drain oil monitoring system is
installed.
2017−08
Lubricating Oils
To Next Page
