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During the last 10 years many researchers and technical groups have studied and performed tests in the area of diesel fuel lubricity [1]1. Protection of diesel engine fuel delivery system components from excessive wear has been the major mission of these efforts. Understanding of the issue, developing laboratory test methods, specifying appropriate fuel properties, and creating mechanical modifications to the equipment, as well as adding lubricity additives to the fuels, describes the bulk of the work which has been performed in this area. Technical groups from several organizations such as the Society of Automotive Engineers (SAE), the Coordinating European Council (CEC), and the International Organization for Standardization (ISO) have made substantial progress and some have come up with test methods and fuel specifications [2].