are as follows: abrasive and corrosive effects, unfavourable combustion
characteristics, poor compatibility with mineral oils and, last but not least,
adverse effects on the environment. The order for the fuel must expressly
state what is not permitted as the fuel specifications that generally apply do
not include this limitation.
If engine oils (old lubricating oil, ULO – used lubricating oil) are added to fuel,
this poses a particular danger as the additives in the lubricating oil act as
emulsifiers that cause dirt, water and catfines to be transported as fine sus-
pension. They therefore prevent the necessary cleaning of the fuel. In our
experience (and this has also been the experience of other manufacturers),
this can severely damage the engine and turbocharger components.
The addition of chemical waste products (solvents, for example) to the fuel is
prohibited for environmental protection reasons according to the resolution
of the IMO Marine Environment Protection Committee passed on 1st January
1992.
Leak oil collectors that act as receptacles for leak oil, and also return and
overflow pipes in the lube oil system, must not be connected to the fuel tank.
Leak oil lines should be emptied into sludge tanks.
Viscosity (at 50 °C) mm
2
/s (cSt) max. 700 Viscosity/injection viscosity
Viscosity (at 100 °C) max. 55 Viscosity/injection viscosity
Density (at 15 °C) g/ml max. 1.010 Heavy fuel oil preparation
Flash point °C min. 60 Flash point
(ASTM D 93)
Pour point (summer) max. 30 Low-temperature behaviour
(ASTM D 97)
Pour point (winter) max. 30 Low-temperature behaviour
(ASTM D 97)
Coke residue (Conrad-
son)
weight % max. 20 Combustion properties
Sulphur content 5 or
legal requirements
Sulphuric acid corrosion
Ash content 0.15 Heavy fuel oil preparation
Vanadium content mg/kg 450 Heavy fuel oil preparation
Water content Vol. % 0.5 Heavy fuel oil preparation
Sediment (potential) weight % 0.1 –
Aluminium and silicon
content (total)
mg/kg max. 60 Heavy fuel oil preparation
Acid number mg KOH/g 2.5 –
Hydrogen sulphide mg/kg 2 –
Used lube oil (ULO)
(calcium, zinc, phos-
phorus)
mg/kg Calcium max. 30 mg/kg
Zinc max. 15 mg/kg
Phosphorus max. 15
mg/kg
The fuel must be free of lube
oil (ULO – used lube oil). A fuel
is considered contaminated
with lube oil if the following
concentrations occur:
Ca > 30 ppm and Zn > 15
ppm or Ca > 30 ppm and P >
15 ppm.
Leak oil collector
Specification of heavy fuel oil (HFO) D010.000.023-05-0001
General
2017-07-11 - de
010.000.023-05
MAN Diesel & Turbo
2 (13) D010.000.023-05-0001 EN
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