Does anyone know if Mighty VS7 Universal Power Steering Fluid is compatible with CHF11S? I had my oil changed today and they topped up the power steering reservoir with that stuff before I could stop them . I couldn't find anything that said whether it is or is not compatible with CHF11S.

 

Pentosin is synthetic and the Mighty fluid is not; From their compatibility:

‘Compatible with all non-synthetic power steering fluids‘

I would be concerned with this fouling the existing fluid.

Steve

 

You should drain the power steering fluid and replace it.

Then get in the habit of telling them not to top off any under hood fluids.