MIL-L-21260D, MILITARY SPECIFICATION: LUBRICATING OIL, INTERNAL COMBUSTION ENGINE, PRESERVATIVE BREAK-IN (29-APR-1988) [S/S BY MIL-PRF-21260E]

MIL-L-21260D, MILITARY SPECIFICATION: LUBRICATING OIL, INTERNAL COMBUSTION ENGINE, PRESERVATIVE BREAK-IN (29-APR-1988) [S/S BY MIL-PRF-21260E]., This 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).