ROYCO 555 | Turbine Engine and Helicopter Transmission Oil - DOD-PRF-85734A

Royco 555 is a premium synthetic lubricant specifically engineered to meet the rigorous demands of DOD-PRF-85734A specifications. Designed for use in both gas turbine engines and helicopter transmissions, Royco 555 offers exceptional performance and protection under extreme operating conditions.   

Key Features and Benefits:

• Superior Oxidation and Thermal Stability: Resists breakdown at high temperatures, ensuring long oil life and minimizing deposits.   
  
• Excellent Wear Protection: Protects critical engine components from wear, extending engine life.   
  
• Enhanced Shear Stability: Maintains viscosity under extreme shear conditions, ensuring consistent lubrication performance.
  
• Outstanding Demulsibility: Resists emulsification with water, preventing corrosion and sludge formation.
  
• Wide Operating Temperature Range: Provides reliable lubrication in a broad range of operating temperatures.

Applications:

• Gas Turbine Engines: Ideal for lubricating components in high-performance gas turbine engines.   
  
• Helicopter Transmissions: Specifically designed for use in helicopter transmissions, providing smooth and reliable operation.

Specifications :

• Meets U.S. Mil Spec - DOD-PRF-85734
• Meets the requirement of U.K. DERD. 2497
• Meets the requirement of XAS-2354
• Meets the requirement of British DEF STAN 91-100
• Meets the requirement of NATO Code O-160
• Meets the requirement of UK Joint Service Designation OX-26

• All in-stock orders are processed within 1–2 business days (excluding weekends and holidays) after receiving your order confirmation email.
• Orders with a lead time will ship according to the estimated shipping time shown on the product page.
• If we experience a high volume of orders or if an item is backordered, processing times may be slightly delayed. We will notify you promptly via email.

• Returns must be made within a maximum of 3 business days after receiving the product, with prior authorization from Aircraft Shop Supply (Return Material Authorization). Returns without prior notice or written authorization will not be accepted.
• For products with 3 to 6 months of remaining shelf life, claims must be made within the next 2 business days after receipt.
• Returns are not accepted for products with less than 3 months of remaining shelf life.
• Returns are not accepted for products purchased during a low Shelf Life promotion, items sold with discounts, or special orders that must be placed directly with the factory.
• The customer is responsible for the return shipping cost, except in cases where the return is due to an error on the part of Aircraft Shop Supply.
• Refunds will only be issued after the product has been inspected and no damage is found.
• A 25% Restocking Fee will be charged for returns of products in good condition that are either no longer needed or were ordered incorrectly.
• A 35% Restocking Fee will be charged for returns of products with one year or less of remaining shelf life.
• No Restocking Fee will be charged if Aircraft Shop Supply is responsible for incorrectly shipping a product, or if the order is damaged upon leaving the warehouse.
• Hazardous Materials & Dangerous Goods: These items are sold as final and are not eligible for return approval.