MIL-PRF-87100A(USAF)
2.4 Order of precedence. 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 lubricating oils furnished under this specification shall be products that are authorized by
the Qualifying Activity for listing on the applicable Qualified Products List (QPL) before contract award (see 4.2
and 6.3).
3.2 Materials. The composition of this lubricating oil is not limited; however, known or suspected human
carcinogens (as defined by the Occupational Safety and Health Standards Hazard Communications, 29 CFR
1910.1200) are prohibited. The basestock shall be essentially bis(phenoxyphenoxy)benzene. The engine
lubricating oil shall have no adverse effect on the health of personnel when used for its intended purpose. Recycled
basestocks are permitted; however, each batch must be fully tested in accordance with all qualification
requirements of this specification. The manufacturer may be required to submit certification of conformance to
this paragraph (see 6.2).
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.
3.4 Bench performance requirements. Bench performance requirements shall be as specified in 3.4.1 and 3.4.2.
3.4.1 Bearing deposition. Bearing deposition of the lubricating oil shall be determined in accordance with 4.4.3.
Results of the determinations shall comply with the following:
Deposit rating
60 max
Filter deposit weight, g
2.5 max
Oil consumption, ml
1440 max
Viscosity at 40°C, % change
25 max
Acid number change, mg KOH/g
0.20 max
Metal specimen weight change, mg/cm2
±0.2 max
3.4.2 Gear load-carrying capacity. The gear load-carrying capacity shall be conducted as specified in 3.4.2.1 and
3.4.2.2. The average of six determinations shall be required to determine load-carrying capacity. Test results of
all determinations shall be included in reporting data.
3.4.2.1 Gear load-carrying capacity requirement conducted at 74ºC(165ºF). Load-carrying capacity shall be
determined in accordance with ASTM D1947 using AMS 6260 test gears. Only those gear machines having a
reference oil "C" average rating within the range 438 to 578 kN/m (2500 to 3300 lbf/in) are acceptable. Test
results must include reporting data on all determinations conducted. The average percentage of the relative rating
determinations shall be multiplied by the reference oil specified average of 508 kN/m (2900 lbf/in).
Load-Carrying Capacity
Avg % Relative Rating x 508 kN/m (2900 lbf/in)
Determinations
2 minimum
336 kN/m (1920 lbf/in) min
4
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