Porsche screen wash

[DJMC]

It just occurred to me I've filled up my 981 washer bottle (with proper Porsche stuff naturally) only twice in 20 months.

I do 12k miles a year. How big is the washer reservoir!!??

[DJMC]

Coxey said:

Do you have to use the Porsche stuff or can you use anything?, any recommendations?

Thanks

Yes, if under warranty.

But in any case, as has been said, it's weirdly effective and economical when used as directed.