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    Kidney Filtration-Secondary Effects???

    Does kidney filtration improve or degrade viscosity improvers, additives, moly, TAN etc.? Most hydraulic fluids are shipped 20/17/15, or thereabouts. I always kidney filter for 12 hours in the factory container prior to the filtered transfer to the reservoir yielding improved filtration to...
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    Blending oils with different VI's, is it just arithmetic mean?

    I just have a basic question. The oil in both cases is AW ISO 46 hydraulic oil, there is 275 gallons total. If you combine the following. 220 gallons of ISO 46 where the VI is 156.25. Then take 55 gallons of ISO 46 where the VI is 100. With the above fluids blended together for a total of...
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