Forum Discussion
markchengr
Feb 08, 2020Explorer II
Quite often you are getting a blend of propane and butane. Butane while richer in energy (BTU's) boils at a lower temperature therefore the pressure at any given temperature will be lower than propane. If you fill at a place very far south in the wintertime you may have a butane rich gas that will not have enough vapor pressure if you drive far north to use it. This has happened to people who fill in Mexico and then drive to high altitude in January.
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