K1200GT cooling system capacity.
From the trusty-rusty DVD... 3.5 Liters. "Nitrite-free" and "with corrosion-inhibitors" are the only specified qualities, which isn't really helpful on-line researching.
I saw this stuff on Amazon and eBay, and I smell snake-oil, though that's hardly scientific or even rational. This seemed like an internally- and externally-consistent source of information: [url]http://www.machinerylubrication.com/Read/841/coolant-fundamentals[/url]
Given that others here have reported finding Prestone or other commonplace brands that work AND cost 1/3rd of BMW's re-branded Pentosin (which isn't much cheaper), may I suggest caution here? I'd love to know if this stuff works, but I'd rather hear a chemist explain it than have you run the risk of a wrecked motor. Note that even if your engine ISN'T wrecked prematurely, we still won't have usable proof that this stuff is safe/effective.
My 2 cents, and not worth even half that.