1945-01-01

HOT-ENGINE SLUDGE and ITS CONTROL 450168

SLUDGE is a slushy mass composed of oil thickened with the oxidation and decomposition products of the oil and fuel. In hot-engine sludge the oxidation products of the oil are the principal cause of trouble.
The steps in the development of sludge control have been:
  1. 1.
    Development of more highly refined oils from which the easily oxidizable sludge-forming material has been removed.
  2. 2.
    Addition of either oxidation inhibitors or detergents, separately.
  3. 3.
    Addition of both oxidation inhibitors and detergents together in the same oil.

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