Standard Test Method for
Precipitation Number of Lubricating Oils1,2
This standard is issued under the fixed designation D 91; 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 standard has been approved for use by agencies of the Department of Defense.
Click below to download Astm D 91 – 02 Pdf free
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click here to Astm D 88 – 94 (Reapproved 1999) Pdf free download