VALVE 2997182 - Caterpillar

basestock oils are acceptable for use in Cat engines IF these oils meet the performance requirements that are specified by Cat.Rerefined basestock oils can be used exclusively in finished oil or in a combination with new basestock oils. The US military specifications and the specifications of other heavy equipment manufacturers also allow the use of rerefined basestock oils that meet the same criteria.The process that is used to make rerefined basestock oil should adequately remove all wear metals and all additives that are in the used oil. Vacuum distillation and the hydrotreating of the used oil are acceptable processes that are used for producing rerefined base oil.Note: Filtering is inadequate for the production of high quality rerefined basestock oils from used oil.