Wow....awesome info guys. keep it up. I might have to print this page so I can refer back to it easily!! There's always been so much confusion and conflicting info on this subject. It's nice hear some hard facts regarding the matter. I've always heard keep your fuel in a cool dark spot and in a sealed metal can. Why specifically a metal can? Is it because it will breathe less due to the integrity of the material? I'm sure a metal can will also probably seal better than anything plastic that's out there.