I kicked myself last month for not purchasing gas cans with Propane when I had the opportunity.
As a result, whilst tenting in temperatures down to plus 4 degrees C, the Butane cans (despite being full) had low pressure, therefore took longer to heat water and food.
An old trick I learned many years ago, was to 'stick it up yer jumper' so to speak.
Warming the gas can with body heat does (for a while) produce normal pressure.
I didn't do this on this occasion, to prove point to my wife.
I did later though.
Fortunately, I managed to find some Propane/Butane mix ones recently.
There are some Internet Retailers claiming to supply the dual gas cans, but in fact supply the Butane only ones.
Now all I have to do, is persuade my wife I need to check them out during this winter.
Regards James
------------- In the beginning there was darkness.
Then I bought a tent.
I'm not destitute, I'm just poor.
Liquid propane gases off at much lower temperatures than liquid butane. Propane also burns hotter (which is why it is used for flame-cutting gear) so it will boil a kettle or heat your dinner quicker.
I used a butane cylinder when I camped at Bewdley in mid-November and despite only a light overnight frost (a degree or two below zero) the pressure was so low it wouldn't bring the kettle to the boil.
For refillable cylinders, I'd recommend propane in winter. For smaller appliances running off non-refillable canisters, go for the 'melange' type which contain a propane-butane mix.
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Topic: butane gas v propane
