Engine Manufacturers Recommend ISO 4406 for Fuel Cleanliness
Modern fuel systems are designed to reduce emissions, lower fuel consumption and improve engine performance. To achieve this they must operate at very high pressures, but engine manufacturers warn that this increases the risk of failure if the fuel used is not clean. To be recognised as clean the fuel must meet a rating of 18/16/13 on the ISO 4406 cleanliness scale. Manufacturers therefore recommend that clients should adopt a stringent fuel conditioning programme, especially if fuel is to be stored for 6 months or more. Why is dirty diesel a problem? When operating at high pressure any small, hard particles in the fuel become a source of potential system malfunction. If left untreated…
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