ARMY MIL-PRF-21260E VALID NOTICE 1
ARMY ML-PRF-21260E VALD NOTCE 1 2008-NOV-17 Lubrcatng Ol nternal Combuston Engne Preservatve Break-n
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This performance specification covers engine oils suitable for preservation, break-in, and lubrication of reciprocating internal combustion engines of both spark-ignition and compression-ignition types, and of power transmission fluid applications in equipment used in combat/tactical service (see 6.1, 6.7 and 6.9).