MIL-PRF-23699G
3.5.2 Service evaluation. The oil shall be rated as satisfactory after the model engine evaluation and
flight evaluation tests specified in 4.4.18.
3.6 Toxicity. The lubricating oil shall have no adverse effect on the health of personnel when used
for its intended purpose (see 6.8).
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein shall be classified as
follows:
a. Qualification inspection (see 4.2).
b. Conformance inspection (see 4.3).
4.2 Qualification inspection. Qualification inspection shall consist of testing to all the requirements
specified in this specification. When required by the qualification activity, additional evaluations (engine
and flight test service evaluation) may be required on candidate formulations.
4.2.1 Qualification process. The general outline of the qualification process (see 6.3) is described in
SD-6.
4.2.2 Requalification. Requalification shall be required when any change is made in source of
manufacture, purity, or composition of the lubricating oil base stocks or additives. A minor change in the
oil formulation may be made without requalification testing, but only after notification to, and approval
by, the qualification activity. Two specific requalification categories are reblend and rebrand, outlined in
4.2.2.1 and 4.2.2.2.
4.2.2.1 Reblend lubricating oil. A reblend lubricating oil is an original qualified product, as
specified in 4.2, in which one or more ingredients have been blended by a manufacturer other than the
manufacturer of the original formulation. A sample of the reblended lubricating oil shall be subjected to
the qualification tests (see 4.2). The engine performance requirements (see 3.5.1) may be waived, at the
discretion of the qualification activity, if the other test results indicate equivalence to the original
formulation. Reblend approvals are initiated by the process specified in 6.3.
4.2.2.2 Rebrand lubricating oil qualification. A rebrand lubricating oil is a lubricating oil which has
successfully passed the qualification tests (see 4.2) and is manufactured by the original formulator at the
original manufacturing site but is packaged/distributed using a second party identifying trade name.
Rebrand approvals are initiated by the process specified in 6.3.
4.2.3 Qualification inspection sample. The qualification test sample shall consist of 208 liters (55
gallons) of finished lubricating oil and 19 liters (5 gallons) of the base oil without additives. A minimum
of 100 grams of each additive ingredient used in the manufacture of the qualification test sample shall be
submitted prior to qualification (see 6.3.2).
4.3 Conformance inspection. Conformance inspection of production lots shall consist of all of the
tests specified in table III. Failure of production lots to pass any of the conformance tests shall be cause
for rejection of the lot.
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