Lubricating oil Ascender

turbine engine

Product overview
AeroShell Ascender is a high-performance turbine oil formulated with a synthetic ester basestock and advanced additives to deliver low coking, improved thermal and oxidative stability, and excellent elastomer compatibility for modern gas turbine engines.

Features and benefits

• Excellent elastomer seal compatibility — Minimises risk of seal swelling or degradation, reducing oil loss and maintenance associated with seal replacement.
• Low coking performance — Low tendency to form coke in bearing chambers and service pipes, lowering cleaning and downtime costs.
• Outstanding TAN stability — Maintains low acid formation in severe operating conditions, preventing sludge and corrosive degradation.
• Enhanced viscosity stability — Resists viscosity breakdown under high temperature and oxidative stress to maintain lubricating film.
• High Performance Capability (HPC) grade — Offers improved performance versus standard oils for extended service intervals and engine protection.

Specifications & approvals
SAE — SAE AS5780D Grade HPC
United States — MIL-PRF-23699G Grade HTS
United Kingdom — DEF STAN 91-101 equivalent
France — DCSEA 299/A equivalent
NATO Code — O-154 equivalent
Joint Service Designation — OX-27 equivalent

Applications
AeroShell Ascender is designed for the latest generation of gas turbine engines requiring low-coking, high-compatibility lubricants. It is suitable for new high-power, high-compression engines and for existing engines where thermal and oxidative limits challenge older oils.

Health, Safety and Environment
Health and Safety

• When used as recommended and with good personal hygiene, the product is unlikely to present significant health or safety hazards.
• Avoid skin contact. Use impervious gloves when handling used oil. After skin contact, wash promptly with soap and water.

Protect the Environment

• Dispose of used oil at an authorised collection point. Do not discharge into drains, soil or water.

Documents
TDS and MSDS are provided in English; additional country-specific documentation may be available.

Typical Physical Characteristics
These characteristics are typical of current production. While future production will meet AeroShell specifications, variations may occur.

Technical characteristics / specifications

• Viscosity (typical): 5 mm2/s (as a 5 mm²/s grade high-performance turbine oil)
• Basestock: Synthetic ester
• Performance: Low coking; superior thermal and oxidation stability
• Compatibility: Excellent elastomer/seal compatibility
• Stability: Outstanding TAN stability; enhanced viscosity stability under severe conditions
• Grade & approvals: SAE AS5780D Grade HPC; MIL-PRF-23699G Grade HTS; DEF STAN 91-101 equivalent; DCSEA 299/A equivalent; NATO O-154 equivalent; Joint Service OX-27 equivalent