MIL-PRF-6085E
ASTM D445
Standard Test Method for Kinematic Viscosity of Transparent and
Opaque Liquids (and Calculation of Dynamic Viscosity) (DoD Adopted)
ASTM D972
Standard Test Method for Evaporation Loss of Lubricating Greases and
Oils (DoD Adopted)
ASTM D974
Standard Test Method for Acid and Base Number by Color-Indicator
Titration (DoD Adopted)
ASTM D1500
Standard Test Method for ASTM Color of Petroleum Products (ASTM
Color Scale) (DoD Adopted)
ASTM D1748
Standard Test Method for Rust Protection by Metal Preservatives in the
Humidity Cabinet (DoD Adopted)
ASTM D4057
Standard Practice for Manual Sampling of Petroleum and Petroleum
Products (DoD Adopted)
ASTM D4636
Standard Test Method for Corrosiveness and Oxidation Stability of
Hydraulic Oils, Aircraft Turbine Engine Lubricants, and Other Highly
Refined Oils (DoD Adopted)
(Copies of these documents are available online at https://www.astm.org or from ASTM International, 100
Barr Harbor Drive, West Conshohocken PA 19428-2959)
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a
conflict between the text of this document and the references cited herein, the text of this document takes
precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a
specific exemption has been obtained.
3. REQUIREMENTS
3.1 Qualification. The instrument oil furnished under this specification shall be products that are
authorized by the qualifying activity for listing on the applicable qualified products list before contract
award (see 4.2 and 6.3).
3.2 Materials. Aircraft instrument lubricating oil (low volatility) shall consist substantially of
synthetic base oil and additive materials to impart oxidation stability and corrosion-protective properties.
Certain esters of the dibasic organic acids containing six to ten carbon atoms are known to be suitable for
use but are not mandatory. The right is reserved to subject oils of new or unusual composition to such
additional tests as are considered necessary to ensure serviceability of the material. Viscosity-
temperature coefficient (VI) improvers or pour point depressants shall not be used.
3.3 Properties. Products shall conform to the requirements as specified in Table I and 3.4
through 3.6 when tested as specified in Section 4.
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