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answered Sep 5, 2014 by cobiesmith (3,310 points)
  • The International Standard Organisation viscosity grade (ISO VG) number gives information on the viscosity of the oil.
  • ISO 3448 is fully supported by the leading national standardisation organisations such as ASTM, DIN, BSI, JIS mak- ing it easier to compare the viscosity of the oils with that specified by the machine manufacturers.
  • ISO 3448 is directly comparable with BS 4231:1982 for classifications at 40° C.

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