MIL-PRF-21260E
TABLE I. Finished oil properties - Continued.
SAE Grade
SAE
SAE
SAE Grade
Property
10W
Grade 30 Grade 40
15W-40
Viscosity apparent, Centipoise
(cP) @ °C
min.
3500 @ -25
----
----
3500 @ -20
max.
3500 @ -20
----
----
3500 @ -15
Kinematic viscosity, Centistokes (cSt)
@ 100 °C min.
5.6
9.3
12.5
12.5
max.
<7.4
<12.5
<16.3
<16.3
@ 40 °C
X
X
X
X
Pumpability, 30 000 cP, max.
@temperature, °C
-25
----
----
-20
High-temperature/high-shear
viscosity, min.
2.9
X
X
3.7
Viscosity index, min. 1/
X
80
80
X
Pour point, °C, max.
-30
-18
-15
-23
Stable pour point, °C, max.
-30
----
----
-23
Flash point, °C, min.
205
220
225
215
Evaporative loss, percent (%) 2/
18
----
----
15
Other properties:
Gravity
X
X
X
X
Carbon residue
X
X
X
X
Sulfur
X
X
X
X
Sulfated ash
X
X
X
X
Total acid number (TAN)
X
X
X
X
Total base number (TBN)
X
X
X
X
Phosphorus
X
X
X
X
Nitrogen
X
X
X
X
Metallic components
X
X
X
X
Chlorine
X
X
X
X
Color
X
X
X
X
Boiling range
X
X
X
X
1/ Limits for the values marked by "X" cannot be established, as they differ from brand of oil to
another for the same grade. These values are influenced by the source of the base stock, the
identities and quantities of additives, etc. During qualification, test values shall be determined
which are characteristics of a particular product and which can serve thereafter to identify the
product.
2/ The indicated limits apply when ASTM D5480 is used.
8
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