Citroën C6
Manual transmission fluid capacity & service interval
The Citroën C6 manual transmission fluid capacity is 1.9 to 2.2 liters depending on the fill type. Two configurations are covered in the data.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| C6 2.2 HDi DPF (2009-2011) |
|
| C6 2.2 HDi DPF (2006-2009) |
|
Additional Notes
- The Citroën C6 carries a manual transaxle layout, meaning the transmission and final drive share a single housing and a common fluid supply.
- Both the 2006-2009 and 2009-2011 variants of the 2.2 HDi DPF specify a dry fill capacity of 2.2 liters, which represents the total volume required when filling a completely drained or newly assembled unit with no residual fluid present.
- The service fill capacity is rated at 1.9 liters across both production periods, reflecting the volume needed during a routine fluid change where some fluid remains in the transaxle passages and cavities after draining.
- The 0.3-liter difference between the dry fill and service fill figures is consistent with the volume of fluid that typically clings to internal components and does not drain fully during a standard gravity drain procedure.
- Both configurations share identical capacity values despite spanning different model year ranges, indicating no revision to the transaxle fluid volume specification between the 2006-2009 and 2009-2011 production periods.
- All listed specifications apply under normal use conditions, meaning the capacity figures are not adjusted for severe-duty or extended-service scenarios in the data provided.