Servo Guard 50 is a high-performance preservation oil engineered to safeguard heavy-duty engines and machinery during storage or transportation. Formulated with a superior blend of base stocks and corrosion-inhibiting additives, this oil offers long-lasting protection to metal surfaces, preventing rust formation and oxidation within the engine assembly. Servo Guard 50 is specifically designed for larger engines and applications where a higher viscosity grade is beneficial. Its thicker oil film ensures excellent surface coverage and durable protection against environmental contaminants such as moisture, dust, and acidic vapors. The oil’s superior anti-rust properties make it a trusted choice for engines that remain inactive for extended periods, including those awaiting export, industrial standby units, and defense-grade machinery. The product meets US Military Specification MIL-L-21260 C Type 1, which certifies its suitability for high-standard preservation and performance requirements. Its excellent flash point of 220°C ensures safety during handling and storage, while a pour point of (-9°C) ensures that it remains effective even under low-temperature conditions. The viscosity index of 90 ensures consistent lubrication film strength, making it ideal for maintaining engine readiness across varied environments. By keeping all internal surfaces coated with a corrosion-resistant film, Servo Guard 50 eliminates the risk of rust and pitting during downtime. The oil is designed so that engines charged with it can be operated directly upon commissioning without needing an immediate oil change. This reduces downtime, minimizes maintenance, and guarantees instant operational reliability. Servo Guard 50 is the preferred preservation oil for organizations and manufacturers who prioritize durability, consistency, and long-term engine protection. It stands as a dependable solution for ensuring that heavy-duty engines remain pristine and performance-ready — from production lines to end-use deployment.

  • meets US Military MIL-L-21260C specifications.
Kinematic Viscosity cSt @ 100°C19.5-20.5
Flash point (COC), °C Min.230
Viscosity Index, Min.90
TBN mg KOH/gm5.6-8.0