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MIL-PRF-32033 is a United States military performance specification that defines the requirements for a specialised water-displacing, preservative lubricating oil for general-purpose applications at low temperatures.
This oil (formerly VV-L-800C) is typically a highly refined mineral oil blended with additives to provide superior rust and corrosion inhibition, especially after exposure to moisture. Its unique capability is the ability to rapidly displace water from metal surfaces, leaving behind a protective and lubricating film.
The oil is intended for both lubrication and protection against corrosion, with primary applications including:
The MIL-PRF-32033 specification covers a single type and grade of oil, categorized by its distinct dual function and low-temperature performance.
| Classification | Detail | Notes |
| Military Symbol | PL-S (Preservative Lubricating Oil, Small Arms) | N/A |
| NATO Code | 0-190 (Type I only) | N/A |
| Low-Temperature Performance | Suitable down to -40°C (approx. -40°F). | Increased viscosity may limit use below this point, requiring item-specific testing. |
| Application | Dipping, brushing, or spraying; widely available in gas-pressurized (aerosol) containers. | N/A |
MIL-PRF-32033 has replaced a legacy U.S. Federal Specification and is recognized by international defense bodies:
| Code Type | Equivalent |
| Supersedes | W-L-800C |
| NATO Code | O-190 (Type I only) |
| UK Defense Standard | DEF STAN 91-79 (Obsolete/Cross-Reference) |
| Joint Service Designation (JSD) | OX-18 (Obsolete/Cross-Reference) |
