Aeroshell 555 Aviation Oil, DOD-PRF-85734A

AeroShell Turbine Oil 555 is a 5 cSt synthetic hindered-ester lubricating oil formulated for demanding gas turbine engine and helicopter transmission applications. It combines high thermal and oxidation stability with enhanced load-carrying capability for systems operating under high temperatures and heavy loads.

AeroShell Turbine Oil 555 is qualified to DOD-PRF-85734A and is identified by NATO Code O-160 and Joint Service Designation OX-26. It is also associated with DEF STAN 91-100, Pratt & Whitney 521C Type II, and GE D-50 TF 1 requirements.

This AeroShell turbine oil is particularly suited to applications where high load-carrying performance is required, including helicopter transmission and gearbox systems. Shell developed AeroShell 555 to provide enhanced performance under the demanding temperature and load conditions encountered in turbine engines and helicopter power transmission systems.

Features & Benefits

• 5 cSt synthetic hindered-ester oil for demanding turbine and transmission applications.
• DOD-PRF-85734A qualified helicopter transmission lubricant.
• High load-carrying capability for helicopter transmission and gearbox systems.
• High thermal stability helps resist oil degradation, coking, and sludge formation.
• Oxidation and corrosion resistance helps protect engines and components during demanding service.
• Synthetic ester formulation designed for aviation turbine lubrication requirements.
• NATO O-160 and Joint Service OX-26 designations.

Applications

AeroShell Turbine Oil 555 is designed for applications requiring a 5 cSt synthetic oil with strong thermal stability and load-carrying performance.

• Helicopter transmission systems
• Helicopter gearboxes
• Gas turbine engines
• Turbine engine accessory systems
• High-temperature turbine lubrication applications
• Applications requiring DOD-PRF-85734A lubricant

Always verify lubricant requirements against the applicable aircraft, engine, transmission, gearbox, or equipment manufacturer's maintenance documentation before use.

Specifications & Approvals

Specification status and equipment approval should be confirmed against the current manufacturer documentation applicable to the specific aircraft or equipment.

Product Characteristics

Compatibility & Handling

AeroShell Turbine Oil 555 contains synthetic ester base oil. Synthetic ester oils can affect certain seal materials, paints, and plastics. Verify material compatibility before introducing the lubricant into a system and follow the applicable equipment manufacturer's instructions.

Do not mix or substitute turbine oils unless the applicable aircraft, engine, transmission, or equipment manufacturer's documentation specifically permits the lubricant.

Refer to the current manufacturer Safety Data Sheet and Technical Data Sheet for detailed handling, storage, compatibility, and safety information.

Product Information

Shelf Life & Storage

BAC currently lists a 1460-day shelf life for the quart package. Shelf life is dependent on the product batch, container condition, and applicable manufacturer requirements. Always verify the shelf-life date and storage requirements on the product container and current manufacturer documentation.

Keep containers sealed and protected from contamination. Refer to the current manufacturer Technical Data Sheet and Safety Data Sheet for detailed storage and handling requirements.

Frequently Asked Questions

What is AeroShell Turbine Oil 555?

AeroShell Turbine Oil 555 is a 5 cSt synthetic hindered-ester oil designed for gas turbine engines and high-load helicopter transmission and gearbox applications.

What specification does AeroShell 555 meet?

AeroShell Turbine Oil 555 is qualified to DOD-PRF-85734A. Shell also identifies the product with DEF STAN 91-100, NATO O-160, and Joint Service OX-26, along with Pratt & Whitney 521C Type II and GE D-50 TF 1.

Is AeroShell 555 the same as AeroShell 500?

No. AeroShell 555 and AeroShell 500 are different turbine oils intended for different specification and application requirements. AeroShell 500 is a MIL-PRF-23699G Grade STD / SAE AS5780D Grade SPC turbine oil, while AeroShell 555 is qualified to DOD-PRF-85734A and is particularly associated with high-load helicopter transmission and gearbox applications.

Is AeroShell 555 the same as AeroShell 560?

No. AeroShell 560 is a high-thermal-stability turbine engine oil in the MIL-PRF-23699 family. AeroShell 555 is a DOD-PRF-85734A lubricant designed with enhanced load-carrying performance for applications including helicopter transmissions.

What viscosity is AeroShell 555?

AeroShell Turbine Oil 555 is a 5 mm²/s, or approximately 5 cSt, synthetic turbine oil.

Can AeroShell 555 be used in any helicopter transmission?

No. Lubricant selection must be based on the applicable aircraft, transmission, gearbox, or component manufacturer's approved lubricant requirements. Verify the current maintenance documentation before use.

Where can I buy AeroShell Turbine Oil 555?

Business Aircraft Consumables stocks AeroShell Turbine Oil 555 in quart cans under BAC part number AS555-QT.