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  1. H

    Viscosity drop why?

    On a recent sample I ran on a 15w40 conoco my Vis dropped to 10.10 with no antifreeze contamination and fuel within limits at 0.50, What could cause this drop?
  2. H

    What does 100% pure paraffin base mean?

    What does 100% pure paraffin base mean? are not all oils of paraffin base?
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