Standard Test Methods for
Phosphorus in Lubricating Oils and Additives1
This standard is issued under the fixed designation D 1091; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This test method has been adopted for use by government agencies to replace Method 5661 of Federal Test Method Standard No. 791b
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