Attempts to improve the performance and efficiency of diesel engines focuses on low heat rejection concepts. These concepts require engine optimization at temperatures significantly higher than those of conventionally cooled engines, particularly in the piston ring-cylinder liner contact area at top ring reversal. These temperatures exceed by a wide margin the operating capabilities of currently available lubricants. The lack of availability of high temperature liquid lubricants presents a major obstacle in the path of development of advanced high temperature diesel engines.

The following, self explanatory view-graphs, summarize the results of the development of a diesel crankcase engine lubricant, capable of performing in a temperature range above that of conventional petroleum oils.

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