ACE Fluid
Discovery 2 ACE fluid for servicing, repairs and reservoir top-ups. Ravenol SSF is our preferred fully synthetic hydraulic fluid for Active Cornering Enhancement systems requiring STC50519, with 1L and 4L packs available.
ACE uses hydraulic pressure to operate the pump, valve block and actuator rams, so the correct fluid matters. Match the fluid specification and pack size to the work being carried out, particularly where the system has been opened for pipe, pump, valve-block or actuator repairs.
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Choose the right Discovery 2 ACE fluid pack
Both pack sizes contain the same Ravenol SSF fully synthetic hydraulic fluid. The main buying decision is how much fluid the job requires: a 1L bottle for top-ups and smaller service work, or the larger 4L container when the ACE system has been opened or a greater quantity is needed.
| Job | Best place to start | Check before ordering |
|---|---|---|
| ACE reservoir top-up | Ravenol SSF ACE Fluid 1L | Confirm that the existing fluid and system require the STC50519 specification |
| Routine hydraulic-fluid servicing | Ravenol SSF ACE Fluid 1L | Allow enough fluid for the work being carried out and any required bleeding |
| ACE pipe, pump or valve-block repair | Ravenol SSF ACE Fluid 4L | The amount required depends on how much of the hydraulic system has been drained |
| ACE actuator or major hydraulic work | Ravenol SSF ACE Fluid 4L | Check the complete system for leaks before refilling and bleeding |
Why we recommend Ravenol SSF
Ravenol SSF is our preferred Discovery 2 ACE fluid. It is a fully synthetic green hydraulic fluid with excellent cold-flow performance and resistance to wear, corrosion and foaming. We also use it as a quality-led power steering fluid in compatible Defender and Discovery systems.
ACE system
For Discovery 2 Active Cornering Enhancement systems requiring STC50519.
For Discovery 2 Active Cornering Enhancement systems requiring STC50519.
Fluid specification
Match the required hydraulic-fluid specification rather than using a generic power steering fluid.
Match the required hydraulic-fluid specification rather than using a generic power steering fluid.
Pack size
Use the 1L bottle for top-ups and smaller jobs, or the 4L container for larger ACE repairs and fluid replacement.
Use the 1L bottle for top-ups and smaller jobs, or the 4L container for larger ACE repairs and fluid replacement.
Do not mix fluids
Check what is already in the reservoir before adding fluid, especially where the vehicle’s service history is unknown.
Check what is already in the reservoir before adding fluid, especially where the vehicle’s service history is unknown.
Related ACE and hydraulic-fluid sections
| Section | Use it for |
|---|---|
| Discovery 2 ACE Parts | ACE pumps, actuator rams, valve-block parts, filters, seals and hydraulic pipework |
| ATF & Steering Fluid | Power steering, automatic gearbox and related hydraulic fluids |
| Oils, Grease & Fluids | The complete engine oil, transmission fluid, coolant, grease and hydraulic-fluid range |
