From MolaKule's posts from Feb 3 and 4 of 2005 in this
extremely long thread:
Here is the actual wording from paragraph 14.6 "Relative Bias" of D4741-00:
quote:
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Results from this test method were found, by interlaboratory studies to agree with those from Test Method D 4683 at both 100 C and 150 C. They can be expected to give, on average in the long run, the same results for the same oil.
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D4683 says the same thing in paragraph 14.3 but adds another that correlation is the same with test method D5481 as well.
No deltas were given for D4683 verses D4741 or D5481.
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I looked briefly at D5481 today. It appears to be an updated D4624 with a new math algorithm to better correlate with the other specs. Apparently, the Capillary viscosimeter was off at times by 50% for certain oils.
