MWM MS 3.9L, Operation And Maintenance Manual, Page: 31 / 53

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NP 085.70.69 - 01/06
3. In periods of intense cold weather (0°C or less), add 20% of aviation
kerosene to diesel fuel. This procedure will prevent a fuel piping obstruction
by paraffin contained in diesel fuel.
During refueling, put kerosene first into the tank and then add the fuel.
Note: Use only aviation kerosene at places where temperature
is below zero degree centigrade (0°C).
Fuel Filter and Pre-Filter
The filters retain the fuel impurities, in a manner that the system receives a
clean fuel, this way avoiding damages to engine fuel injection pump and
injection nozzles.
Note: Use only genuine filter elements and replace them within
the recommended periods