Butane content is more a function of geography and average outside temperature.
Butane depresses the vapor pressure of LPG at a fixed temperature.
There's more butane in Mexico LPG than LPG in Minnesota.
http://www.engineeringtoolbox.com/propane-butane-mix-d_1043.html
Ed Kelleher
At 05:30 AM 05/24/2015, Nels Anderson wrote:
It might not matter too much, but retail "propane" usually contains a lot of butane. I wonder how consistent it would be from cylinder to cylinder.
