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Is oil containing re-refined base stocks acceptable?

April 26, 2017acceptable base containing Oil re-refined stocks

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Is oil containing re-refined base stocks acceptable?

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Oils containing re-refined base stocks are acceptable for use in Caterpillar engines if they meet the specified performance requirements. The re-refined base stock oils can be used exclusively in finished oil of in combination with new base stock oil. The process that is used to produce the re-refined base stock oil generally involves vacuum distillation and hydrotreating of the used oil. Filtering is inadequate for the production of high quality base stocks.