Propane/Butane mix?

[Waygoner]

I've been told that a propane/butane mix will burn better at higher elevations (see my post about Mr.Heater). Is this mix commonly available? Anyone know where I can get a 20lb bottle filled in Colorado?

BHT

 

[400bull]

It is my understanding the a Propane/Butan mix will burn better at higher altitudes that just plan propane will. I don't know if you can get a 20 lb bottle filled with it. The only way that I have seen it packaged is in the small bottles (6-8 oz) for backpacking.

400bull