Can someone tell me what needs to be mixed in with the Porsche Windscreen Cleaner concentrate, and in what proportion, when making a batch for cold weather ? The concentrate doesn't have any alcohol in it so what keeps it from freezing in winter ?

 

OK. Forget that question. How about suggestions on which type of wash fluid you use ? My understanding is that some are better than others for wiper blade life and clear coat paint finishes, over time, dependent upon the antifreeze additives in the wash fluid . Maybe some of the detailing pros could shed some light on the subject ?

 

Sorry for taking so long to respond to the original question...it was a tough one. I'll call our dealer and ask about it.

As for a washer fluid, I like the P21S version and use it in my truck.

http://www.glisteningperfectionstore...dshield/Detail

The product is designed to work with existing washer fluids and as a booster to just plain water..just make sure you use purified or deionized water.