4 FUEL
Mitsubishi Diesel Engine S16R & S16R2 OPERATION & MAINTENANCE MANUAL
107
Pub. No. K29001-00320 Revision: 1
*1: Cetane index (JIS K 2280) substitutes. When the fuel which satisfies the service limit of cetane number
is not available with some inevitable reasons, the use of cetane booster is allowed. However, this is
allowed only for the period before getting the fuel which satisfies the service limit after consulting with
the fuel supplier and the manufacturer of cetane booster, and at the customer's own risk.
The additive rate of 0.5 % or less of cetane booster, and the lube oil analysis at every 125 hours are
recommended.
High concentration of additive may cause metal elusion, rubber material infiltration, increased load in
high-load operation, and acceleration of lube oil deterioration.
• Brand examples of cetane number improver
HITEC 4105K (Made by Afton Chemical)
*2: Only the emergency generator operated at an ambient temperature of 5°C [41°F] or higher, a fuel of
cetane number 40 to 45 and sulfur content 0.2% or less can be used, if the below requirements are
satisfied:
• Install a water heater.
• Time from startup to load input is to be 40 seconds.
• Operating the engine at no load or low load (load factor 25% or less) for a prolonged period of time is
avoided.
*3: If the sulfer content of using fuel is higher than 0.2 weight%, use the specified engine oil "5 ENGINE OIL"
(→ Page 109).
Table 4-3 Fuel Properties Table (2/2)
Item Recommended limit Service limit Remark
Coking
250°C [482°F],
24 Hr
Carbonization 75% or
less
Carbonization 80% or
less
Fed791B (U.S.A.)
230°C [446°F],
24 Hr
Carbonization 55% or
less
-
180°C [356°F],
48 Hr
Tar-free -
Aromatics HPLC method
38 volume% or lower
(total of aromatic con-
tent)
38 volume% or lower
(total of aromatic con-
tent)
JIS K 2536:2003
ISO 3837
Polycyclic aromatic content 8 volume% or lower 8 volume% or lower
Asphaltene 0.1 weight% or lower 0.1 weight% or lower -
Paticulate
foreign sub-
stance
Foreign substanc-
es at engine fuel
inlet
1.0 mg/L or less 1.0 mg/L or less
JIS B 9931: 2000
ISO 4405
Lubricity
HFRR wear test
MWSD (Measured
mean Wear Scar
Diameter)
At 60°C [140°F]
460 μm [0.02 in.] or less
(calculated wear scar di-
ameter at standard va-
pour pressure 1.4 kPa
{0.01 kgf/cm
2
} [0.20 psi])
- ISO 12156-1
BDF: Biodiesel fuel (FAME: Fatty
Acid Methyl Ester)
BDF quality shall meet
JIS K 2390, or ASTM
D6751 or EN14214.
BDF blending of 5% by
volume or less is ap-
proved *4
-
JIS K 2390:2008
(FAME for blended
fuel)
ASTM D6751,
EN 14214
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