Propane compresses into a liquid. Once it's there, you can't compress it further. That's physics. And once propane gets to a certain pressure (emptying some gas-phase propane from your tank) or temperature, some of the liquid propane turns into gas to maintain equilibrium
That's just how it works. It science, physics.
Oxygen does not compress into liquid, your argument falls apart there as well. Unless you work in lower than a -118C environment.
If the pressure/FPS is different when using a certain company's green gas cans, then there is a few additives that make it a little different, but mostly propane.
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Last edited by Styrak; December 20th, 2012 at 03:44..