Specifications

28 Fuels

– Lubricity

– Low temperature behavior

Technically, if the characteristics of domestic heating oil satisfy the specifications for the required

diesel fuel, then it can be used in a diesel engine.

Cetane number

DIN 51 603 -1 does not specify the cetane number. If heating oil is used, the cetane number must

therefore be quoted by the supplier or measured and be at least 45 as required in the MTU Fluids and

Lubricants Specification. The calculated cetane index must not be less than 42.

Sulfur content

In accordance with DIN 51 603 -1, the maximum sulfur content for EL-1 standard heating oil is 0.2%.

The maximum sulfur content for EL-1 heating oil is 50 mg/kg. Lubricity additives must never be

added as its primary purpose is for heating. Lubrication problems can therefore be expected when

using these qualities of heating oil because of the missing additives.

Consultation with the individual fuel supplier is necessary.

Supplementary fuel additives

The engines are so designed that satisfactory operation with normal, commercially available fuels is

ensured. Many of these fuels already contain performance-enhancing additives.

The additives are added by the supplier as the agent responsible for product quality.

The anti-wear additives in ( → Table Approved anti-wear additives (Table 13) on page 27) represent an exception.

Attention is drawn to the fact that the use of diesel fuels or additives other than those stipulated in the

MTU Fluids and Lubricants Specifications is always the responsibility of the operator.

Microorganisms in fuel

Bacterial attack and sludge formation may occur in the fuel under unfavorable conditions. In

such cases, the fuel must be treated with biocides in accordance with the manufacturer’s

specifications. Overconcentration must always be avoided.

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