This research is the study of chemical properties within and of the lubricating oil used in diesel engines. Randomly collect samples of the lubricating oil used, and examine the properties ASTM-D6595, ASTM-D445 standards Focus Lab, FTIR, ASTM-D4739 and use performance monitor, analyse the effect of changing the properties of the lubricant against the failed run against the life of the lubricant and the age of the engine compared to the discussion through various charts. from the analysis of the results of the weaving try. The average number of properties are still in the relationship between the criteria and see properties.
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