MIL-PRF-6081D
3.3 Chemical and physical requirements. All classifications of the finished lubricating oil shall conform to the
requirements listed in section 3 and table I when tested in accordance with the applicable test methods.
TABLE I. Chemical, physical, and performance requirements.
Characteristic
Requirement
Test Method
Grade 1005
Grade 1010
ASTM
FED-STD-791
0.10 max 1/
0.10 max 1/
Acid number (T.A.N.), mg KOH/g
D974
Viscosity at:
37.8°C (100°F), cs
5.0 min
10.0 min
D445
-40°C (-40°F), cs
3000 max
D2532
-54°C (-65°F), cs
2600 max
D2532
Viscosity stability cs, % change
@ 3 hours:
D2532
3 max 2/
-54ºC (-65ºF)
2 max 2/
-40ºC (-40ºF)
Flash point, °C(°F)
107(225) min
132(270) min
D92
-57(-70)max
Pour point, ºC(ºF)
D97
ASTM Color
No. 5.5 max
No. 5.5 max
D1500
Copper strip corrosion at 121ºC(250ºF)
1 max
1 max
D130
FTM 53085/
Corrosion and oxidation stability
D4636
at 121ºC (250ºF).3/
Post Test Oil Properties
4/
Viscosity change, %
-5 to +20 max
-5 to +20 max
0.2 max
Acid number change
0.2 max
no visible sludge
Sludge volume, ml
no visible sludge
Post Test Metal Specimen
Weight change, mg/cm2 6/
±0.2 max
±0.2 max
Copper
±0.2 max
±0.2 max
Steel
±0.2 max
±0.2 max
Aluminum alloy
±0.2 max
±0.2 max
Magnesium alloy
±0.2 max
±0.2 max
Cadmium-plated steel
Trace sediment, (ml / 200 ml of oil) 7/
0.005 ml max 8/
0.005 ml max 8/
D2273
Titrate to a pH 11 end point.
1/
2/ Viscosity measurements taken at the specified temperature after three hours at test temperature, 121ºC (250ºF).
3/ Measurements taken after metal has been subjected to the lubricating oil for 168 hours at 121ºC (250ºF).
4/ Compared with viscosity of new oil samples tested at 37.8ºC (100ºF).
5/ When substituting heptane or acetone for 1,1,1-trichloroethane, use the heptane or acetone at ambient temperature; do not heat as
required by paragraphs 6.6.1 and 6.10.1 of FTM 5308.
6/ There shall be no pitting etching or visible corrosion on the surface of any of the metals when viewed under a magnification of 20
diameters. A slight brown stain on the surface of the copper shall be permitted, but dark brown, gray, or black stain shall be cause for
rejection. A slight discoloration of the cadmium will be permitted.
7/ When using Method D2273 to determine presence of trace sediment in the lubricating oil, no diluents shall be used.
8/ Measurements taken after centrifuging.
4
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