Pentosin 7 or 11 for 99 Passat?

[coasterguy]

Would Pentosin CHF 7 or CHF 11 be the best for a 99 Passat as a replacement for the darkening stock fluid with 60k miles?

Also is it safe to Arx the PS with Pentosin fluid?

Thanks

 

[moribundman]

You need CHF 11s.

I believe Frank said ARX was compatible with all P/S fluids, but better check his website or ask him.