Green Peak here.
As long as it's safe for aluminum, you'll be fine. And ALWAYS use distilled water. This is important.

 

I use whatever is cheapest at wal-mart, so usually the wal-mart brand. I buy pre-diluted and its the green type. If I buy the stuff you need to add water to I have a bad habit of mixing it with my well water. I also run water wetter, this stuff really works, brought down the temp on my temp gauge a little bit.