My 964 has the concentrated screenwash reservoir. It says in the manual use special stuff from Porsche. I can't believe everyone pays OPC prices, so what do you all use instead?
They sneaked it in on a service when I forgot to fill up the reservior and courteously left me the bottle! It is a very clever and well designed bottle though
I found 3 bottles of the stuff in the shed yesterday so If you want one mail me an address. It lasts years if you dont go out in the rain and use the washers !!