sounds like taking the "free" washer fluid is going to cause problems - I'm about to get another big bottle of super-concentrate - and make up our own - all you need a couple of bottles - gallon milk jugs will do...
16 oz - makes 8 gallons - cost $3.02 (wholesale) - you can find it on Amazon for $7.05 - when the gallon of fluid at the store is $2 on special - you're going to be ahead by about 50% savings - and if you want to make it a little stronger - say 2.25 fl oz per gallon - you can do so.
Want a generic formula? Look up "Cyclo C-207" or "Cyclo C-206" on Amazon.
535i XDrive | Alpine White w/Black+Natural Leather Interior
It's ALL perspective - get some. No - I am NOT addressing YOU!