Specifications

26 Fuels
• For Series 457, 460/1800, 900 and 500 engines, special equipment is available which facilitates an increase in
the engine oil change intervals for operation with 100% FAME. This involves fitting the engines with special
equipment Code MK21 (special unit pump) and Code MK04 (fuel prefilter with heated water separator).
Engine version Engine oil change interval
Engines not fitted with special equipment for operation
with FAME
Reduction of engine oil change interval to 30% of the
interval required for operation with fossil diesel fuels.
Engines fitted with special equipment Code MK21 and
Code MK04
Reduction of engine oil change interval to 50% of the
interval required for operation with fossil diesel fuels.
The relevant engine oil change intervals mu
st be complied with without fail!
Exceeding the engine oil change intervals can cause engine damage!
• Operation with 100% FAME requires shortened fuel filter change intervals. A new fuel filter
must be fitted each time the engine oil is changed.
• Fuel and engine oil must be changed approximately 25 operating hours after conversion to FAME due to the
danger of blockage caused by loosened deposits (FAME has a pronounced cleaning effect).
• Over longer periods, fuel filter service life may be reduced as a result of old residues being carried into the filter
from the fuel system. A special, approved fuel prefilter can be installed as an improvement. This fuel prefilter
with heated water separator is already installed on engines fitted with special equipment Code MK04.
Engine Power and Engine Standstill
• Due to its calorific value, operation with 100% FAME involves a reduction of approx. 8%-10%
in engine power. This leads to a corresponding increase in fuel consumption as compared to
operation with diesel fuel. Engine power corrections are not permissible.
• Prior to any extended period out of operation, the fuel system must be flushed out in order to prevent
congestion. For flushing, the engine must be operated for at least 30 minutes on diesel fuel.
General Information
• We can make no comment with regard to the level of FAME resistance of the fuel system,
which is not part of our scope of supply.
• FAME is an extremely effective solvent. Any contact with paint, for example, must therefore be avoided.
• The characteristic smell of FAME exhaust, especially during long periods of idling, may be perceived
as unpleasant. The nuisance c aused by smell can be reduced by an oxidation catalyzer which may
be installed by the vehicle / equipment manufacturers at their own risk.
Our company accepts no responsibility for and provides no warranty in respect of any fault or damage
connected in any way with the use of FAME of a lower quality or resulting from noncompliance with
our specifications on operation using FAME. All resultant irregularities and consequential damage
lie outside our responsibility.
Vegetable Oils as an Alternative to Diesel Fuel
The use of pure vegetable oils as an alternative to diesel fuel or FAME is strictly prohibited due to the
absence of standardization and to negative experience (engine damage caused by coking, deposits
in the combustion chambers and oil sludge)!
Low-Sulfur Diesel Fuels
Sulfur is contained in chemically bound form in crude oil and is therefore present in fuel at varying levels.
A sulfur content of max. 50 mg/kg or 10 mg/kg (depending on category) has been a European Union requirement
since 01.01.2005. The term “sulfur-free” is used here to designate diesel fuels with a sulfur content of max. 10
mg/kg. Low-sulfur diesel fuels (max. 50 mg/kg) are to be recommended for environmental reasons. In order to
avoid problems with wear, lubricity additives, among other things, are added by the manufacturer.
A001061/33E 08-01 ©MTU
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