Thanks but; 1. My first step in "googling" was asking my friends here on the Rocketry Forum. B. I'm really quite surprised that you guys haven't already done a scientific study on this. Am I the first guy to ask to ask this question? (I'm sorry, I just came here from years of playing Kerbal Space Program, and on the KSP forums they would have already digested this information into 3 spreadsheets; cross referenced by manufacturer, price, and ignition temperature.) So I'll go hunting on the big, wild, www. But isn't this part of an FAQ for this subforum?