Lubricating Oil, Internal Combustion Engine, Preservative Break-in
General Description
MIL-L-21260E is a preservative oil designed to provide long term protection of metal surfaces. 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.
Available in grades as noted below.
Application
MIL-L-21260E is used as provided for internal metal protection. MIL-L-21260E can also be used for external metal protection by dipping the parts to be protected in a vat or spraying the parts to be protected with air sprayers, pump type sprayers or by pouring the product over the parts. Removal of protective films is accomplished by using a steam cleaner or washing the parts in mineral spirits.
Physical Properties
| Appearance | Dark Brown Liquid |
| Odor | Mild Solvent Odor |
| Specific Gravity | 0.90 - .098 |
| Flash Point (minimum) | 300º F |
| Melting Point | Liquid as Provided |
MIL-L-21260E meets following specifications:
| Viscosity Grade | Military Symbol | NATO Code |
| SAE 10W | PE-10 | C-640 |
| SAE 30 | PE-30 | C-642 |
| SAE 40 | PE-40 | ---- |
| SAE 15W-40 | PE-15/40 | ---- |
Availability
MIL-L-21260E is available in UN approved 5 gallon pail, 55 gallon drums and bulk quantities.
Handling
Observe warning label on containers. Normal precautions for industrial chemicals apply.
MIL-PRF-21260E GRADE 15W 40 SDS