ABSTRACT
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Many applications of surfactants in lubricants and fuels have a common purpose, namely to reduce or prevent the formation of deposits by the degradation products of lubricants and fuels. In lubricant applications, surfactants serve in various roles. In crankcase oils, surfactants reduce and prevent sludge formation and deposit formation in pistons, cylinders, and valve train systems [1]. They also reduce and prevent sludge formation in the reservoirs of transmission fl uids, gear oils, and industrial oils, and keep parts clean by prevention of deposit formation on metal parts. In addition, they provide friction control in friction interfaces as in automatic transmissions.
