This could also be what I've noticed:
Another tip is to choose the right canister fuel blend for cold weather. Fuel that is a mix of iso-butane (boiling point 12 �F) and propane, works better in below freezing temperatures than fuel containing butane (boiling point 31 �F), because the fuel in the canister will continue to vaporize (albeit more sluggishly) at cold temperatures. For cold temperature performance (below freezing), the propane is the basic driving force (because of its low boiling point) that makes the stove work; iso-butane will volatilize and burn along with the propane (but in decreasing amounts) down to its boiling point of 12 �F, while the n-butane will just sit there. Warming the canister will enable it to perform at even lower temperatures. Examples of cold weather fuels are: MSR IsoPro fuel - 80% iso-butane and 20% propane; Snow Peak GigaPower fuel - 85% iso-butane and 15% propane; and Jetboil JetPower fuel which is 20-30% propane with the remainder iso-butane.
Coleman label says butane
Last edited by dinkshooter; 02/28/14.
