Military Fluids
Radcolube® 21260E-15W40
MIL-PRF-21260E SAE 15W40
MILITARY SYMBOL: PE-15/40

DESCRIPTION	REQUIREMENT	TYP. RESULT	TEST METHOD
Flash Point, °C minimum	215	222	ASTM D92
Kinematic Viscosity, Centristokes
@ 100 °C	14.51-15.51	15.01	ASTM D445-10
@  40 °C	98-128	113	ASTM D445-10
Cranking Viscosity, mPa.s
@ -20 °C maximum	7000	6559	ASTM D5293
@ -25 °C, minimum	7000	14,548	ASTM D5293
Pour Point, °C, maximum	-23 °C	-369 °C	ASTM D1298
Gravity, API	27.2-29.2	28.2	ASTM D1298
Sulfated Ash, %	1.18-1.57	1.31	ASTM-D874
Sulfur (finished oil), %	0.302-1.047	0.68	ASTM-D1552
Phosphorous, %	0.103-0.126	0.114	ASTM-D4951
Calcium, %	0.263-0.320	0.291	ASTM-D4951
Barium, %	<0.01	0	ASTM-D4951
Zinc, %	0.171-0.206	0.189	ASTM-D4951
Sodium, %	< 0.01	0	ASTM-D4951
Nitrogen, % minimum	0.077	0.094	ASTM-D4629

Radcolube®21260-15W40 is a petroleum-based, non-synthetic hydraulic fluid.  This engine oil is used for preservation, break-in and lubrication of reciprocating internal combustion engines.  It may be used with both spark-ignition and compression-ignition engine types and of power transmission fluid applications in equipment used in the combat and tactical service. 

Radcolube® is a trademark of RADCO INDUSTRIES, INC.