Originally Posted by cravin

Guys, keep in mind that this was an emergency. I'm agreeing that the BMW coolant is the way to go for regular fluid checks. I had a cracked radiator, so getting something into it was more important than which brand. The Peak blue bottle is a 50/50 pre-mix, thus why it's the "next best thing". You guys are talking about distilled water as if that's something that a regular garage carries. I'd be curious as to whether Peak or a mineralized water like Poland Spring would do more damage over time.

My question to him was "when in a pinch like this, what's the next best anti-freeze to BMW" and he mentioned Peak blue bottle since it's the pre-mix.