MIL-PRF-2104J
compounded with such functional additives (e.g., detergents, dispersants, oxidation
inhibitors, corrosion inhibitors, etc.) as are necessary to meet the specification
requirements.
3.3 Recycled, recovered, or environmentally preferable materials. Recycled,
recovered, or environmentally preferable materials should be used to the maximum
extent possible provided that the material meets or exceeds the operational and
maintenance requirements, and promotes economically advantageous life cycle costs.
3.4 Engine performance. Oils meeting the requirements of this specification shall
lubricate, cool, and prevent corrosion of oil wetted components of diesel engines used
in combat and tactical equipment. The oils shall limit wear, friction, and deposits of oil
wetted engine parts. The qualifying activity shall waive engine performance testing of
SAE 10W, 30, and 40 grade oils if they have been formulated using the same
performance additive package, at the same treat rate, as those used in the formulation
of an SAE 15W-40 grade oil qualified under this specification.
3.4.1 Engine performance requirements. SAE 10W, 30, and 40 grade oils
qualified under this specification shall comply with the conformance criteria as specified
in section 3.4.1.1 through section 3.4.1.8. SAE 15W-40 grade oils qualified under this
specification shall comply with the acceptance criteria as specified in section 3.4.1.1
through section 3.4.1.9
3.4.1.1 Cylinder liner, piston, and bearing wear. All grades shall prevent cylinder
liner, piston, and bearing wear under conditions of high soot in accordance with Table I
or Table II. Oil grades 10W, 30, and 40 shall comply with the liner wear, ring weight
loss, and lead content requirements only. Oil grade 15W-40 shall comply with the merit
rating requirement only. See section 4.3.1 for the verification test methods.
TABLE I. Cylinder liner, piston and bearing wear (T-12).
Primary performance criteria
Rated or measured parameter
One-Test
Two-Test
Three-Test
Liner wear, µmA, maxB
30.0
30.8
31.1
Top ring weight loss, mgC, max
120
132
137
Lead content at EOT, mg/kgD, max
65
75
79
Merit rating, minE
15W-40 only
1000
1000
1000
A
micrometer
B
maximum
C
milligram
D
milligram per kilogram
E
minimum
6
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