AeroShell Ascender

We've Made The Break Thru'.

It's here. A new benchmark for high performance turbine oils.

Aviation chemists had long struggled with the problem of coking reduction against elastomer compatibility - to improve the oil’s properties in one regard meant compromising the other. It resulted in high performance turbine oils that, for many years, were inherently imperfect - and engine seals that degraded prematurely. Our challenge was to change all of that. Shell scientists worked for more than five years to create a High Performance Capability (HPC) oil that would deliver the optimum balance between low coking and seal integrity. We went back to basics and altered the oil’s DNA. And when the formulation was right, we put our prototype through an extensive laboratory test programme, making it the most tested AeroShell lubricant ever.

Elastomer Compatibility Test (Embrittlement), Def Stan 05-50, Part 61, Method 22

Run in triplicate on five types of elastomers. Elastomeric o-rings are suspended on glass hooks & immersed in the test lubricant at a set temperature according to the elastomer type – see table.

• Weight change is measured at 24 hours & 120 hours.
• Embrittlement is measured at 120 hours & thereafter every 24 hours up to end of test at 360 hours.
• Embrittlement is measured by twisting in a ‘figure of 8’ for a few seconds before examining for cracks under x10 magnification.

The industry benchmark Embrittlement test showed that AeroShell Ascender lasted almost twice as long as a competitor HPC oil in tests with fluorocarbon elastomers.

For five years our scientists tested a prototype oil more rigorously than any other AeroShell product in Shell Aviation’s history, to deliver the optimum balance between elastomer compatibility and thermal stability. The result? The first new formulation to fly through the SAE 5780 approval process, setting a new benchmark for high performance turbine oils. For us, it’s a significant achievement. For you, it means less coking, more protection, less aircraft downtime.

AeroShell Ascender has been developed and tested without compromise. No shortcuts, nothing overlooked. Designed to cope with the hotter, harder conditions found in modern turbine engines, we believe it is the most complete HPC oil in its class.