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MAN B&W 9.01
Cylinder Lubricating Oil System
The cost of the cylinder lubricating oil <strong>is</strong> one of the
largest contributions to total operating costs, next
to the fuel oil cost. Another aspect <strong>is</strong> that the lubrication
rate has a great influence on the cylinder
condition, and thus on the overhauling schedules
and maintenance costs.
It <strong>is</strong> therefore of the utmost importance that the
cylinder lubricating oil system as well as its operation
<strong>is</strong> optim<strong>is</strong>ed.
Cylinder Oils
Cylinder oils should, preferably, be of the SAE 50
v<strong>is</strong>cosity grade.
Modern high�rated two�stroke engines have a
relatively great demand for detergency in the cylinder
oil. Therefore cylinder oils should be chosen
according to the below l<strong>is</strong>t.
A BN 70 cylinder oil <strong>is</strong> to be used as the default
choice of oil and it may be used on all fuel types.
However, in case of the engine running on fuel
with sulphur content lower than .5% for more
than to 2 weeks, we recommend to change to a
lower BN cylinder oil such as BN 40-50.
The cylinder oils l<strong>is</strong>ted below have all given longterm
sat<strong>is</strong>factory service during heavy fuel operation
in MAN B&W engine installations:
Company Cylinder oil
SAE 50, BN 60-80
BP Energol CLO 50 M
Energol CL 605
Cylinder oil
SAE 50, BN 40-50
Energol CL 505
Energol CL-DX 405
Castrol Cyltech 70 / 80AW Cyltech 40 SX / 50 S
Chevron *) Taro Special HT 70 Taro Special HT LS 40
ExxonMobil Mobilgard 570 Mobilgard L540
Shell Alexia 50 Alexia LS
Total Talusia Universal
Talusia HR 70
Talusia LS 40
*) Includes Caltex, Chevron and Texaco
Also other brands have been used with sat<strong>is</strong>factory
results.
Cylinder Oil Feed Rate (Dosage)
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The recommendations are valid for all plants,
whether controllable pitch or fixed pitch propellers
are used.
In case of average sulphur content, the average
cylinder oil feed rate at nominal MCR for MAN
B&W Alpha Cylinder Lubricator <strong>is</strong> 0.7 g/kWh.
Adjustment of the cylinder oil dosage to the sulphur
content in the fuel being burnt <strong>is</strong> further explained
in <strong>section</strong> 9.02.
MAN B&W ME/ME�C/ME-B engines 198 48 22�4.5
MAN Diesel