Specifications

Fuels 27
On older series engines (Series 538, 595, 956, 1163) with cylinder heads not fitted with valve seat
inserts, the use of low-sulfur fuel (< 50 mg/kg) can lead to increased valve seat wear. This wear can
be reduced by the addition of anti-wear additives. Approved additives are listed in Table 13 and must
be added to the fuel. The additive must be filled before every refueling.
Approved anti-wear additives (Table 13)
Manufacturer
Brand name
Concentration for use
Liqui Moly
Jerg-Wielandstr.4
89081 Ulm
Tel. [phone]
Fax. [phone]
Blei-Ersatz 250 mg per 1 kg
The Lubrizol Corporation
29400 Lakeland Boulevard
Wickliffe, Ohio 44092
USA
Tel. [phone]
ADX 76611 250 mg per 1 kg
Tunap Industrie GmbH
Bürgermeister-Seidl-Str. 2
82515 Wolfratshausen
Tel. [phone]
Fax. [phone]
Tunadd PS
250 mg per 1 kg
Diesel Fuels in Winter Operation
At low outdoor temperatures, the diesel fuel’s fluidity can be inadequate on account of paraffin precipitation.
In order to prevent operational problems (e.g. clogged filters) during the winter months, diesel fuel
with suitable cold-flow characteristics is available on the market. Deviations are possible during
transitional periods and in individual countries. If no frost-resistant diesel fuels are available, paraffin
oil or aviation turbine fuel must be added before frost sets in. As a basic guide, adding 5% by
volume achieves an improvement of frost resistance of approx. 1° C.
Add the additive to the diesel f uel in good time before the fluidity of the diesel fuel is impaired by paraffin precipitation.
Malfunctions resulting from paraffin precipitation can only be eliminated by heating the entire fuel system.
Petrol (gasoline) must not be added.
Flow improvers
Flow improvers cannot prevent paraffin precipitation but they do influence the size of the
crystals and allow the diesel fuel to pass through the filter.
The effectiveness of the flow improvers is not guaranteed for every fuel.
Certainty is only assured after laboratory testing of the filtering capability.
Required quantities
and mixing procedures must be carried out according to the manufacturer’s instructions.
Heating Oil EL
Domestic heating oil differs from diesel fuel mainly because of the following characteristics:
– Cetane number
– S ulfur content
– Oxidation stability
– Corrosion effect on copper
A001061/33E 08-01 ©MTU
TIM ID: 0000010137 – 007