Originally Posted by monkey_wrench
I missed the bit where it said, in the DYI I searched for and found, that I needed to mix a gallon of BMW coolant and a gallon of distilled water.
Perhaps I'm looking at a different DIY.
My question then was, will any coolant do, or do I need special BMW coolant.
I use peak longlife. http://www.peakauto.com/antifreeze-peak-long_life.shtml
. It is phosphate and silicate free. Change it every two years for the hell of it.