AeroShell Ascender
AeroShell Ascender combines low coking, high performance synthetic hindered ester basestock with advanced additives for superior thermal and oxidation stability and excellent elastomer compatibility.
Features and benefits
Excellent elastomer seal compatibility
Reduced chance of seal swell or degradation that can lead to high oil consumption and cost of changing seals.
Low coking performance
Less chance of oil coke build-up in bearing chambers and service pipes resulting in lower maintenance and cleaning costs.
Outstanding TAN (total acid number) stability
Avoids the formation of harmful sludge and acids by remaining stable in extreme conditions.
Enhanced viscosity stability
Resistance to degradation means it can go on performing in the harsh environments.
A ‘High Performance Capability’ grade oil
Improved performance over traditional ‘Standard’ grade oils can help reduce maintenance costs and extend engine life.
Specifications & approvals
| Country | Specification |
|---|---|
| SAE | SAE AS5780D Grade HPC |
| United States | MIL-PRF-23699G Grade HTS |
| British | DEF STAN 91-101 equivalent |
| French | DCSEA 299/A equivalent |
| NATO Code | O-154 equivalent |
| Joint Service Designation | OX-27 equivalent |
The TDS and MSDS are in English, but you can find these documents for other countries in the Shell EPC area.
Applications
AeroShell Ascender was developed for the latest generation of gas turbine engines as a low-coking, high compatibility product. Its improved thermal and oxidative stability will ensure negligible coke formation in engines. It has also been tested extensively for elastomer compatibility, which is a known service problem. AeroShell Ascender therefore offers the customer the balance of low coking performance with excellent elastomer compatibility.
AeroShell Ascender will also deliver performance benefits in today’s existing high powered, high compression engines in which the older generation of oils can be stressed up to and beyond their thermal limits, as evidenced by oil coking in the high temperature bearing areas.
Health, Safety and Environment
Health and Safety
- This product is unlikely to present any significant health or safety hazard when properly used in the recommended application and good standards of personal hygiene are maintained.
- Avoid contact with skin. Use impervious gloves with used oil. After skin contact, wash immediately with soap and water.
- Guidance on Health and Safety is available on the appropriate Material Safety Data Sheet, which can be obtained from your Shell representative.
Protect the Environment
- Take used oil to an authorised collection point. Do not discharge into drains, soil or water.
Additional information
Advice
- Advice on applications not covered here may be obtained from your Shell representative.
Technical Talk
Elastomer compatibility
Learn how lubricant scientists balance thermal stability and elastomer compatibility to create high-performance turbine oils that prevent coking and help maintain engine integrity.
Coking propensity
Explore how modern turbine oils combat coking, manage heat, and adapt to evolving high-performance aircraft engines, ensuring long-term engine reliability.
Typical Physical Characteristics
These characteristics are typical of current production. Whilst future production will conform to Shell's specification, variations in these characteristics may occur.
