In article , Stormin Mormon wrote:
Not sure about the OP, but I know I am.

As to the OP question. Sealed cans help a lot, keep moisture and air
out. I remember something about stabil for kerosene.

Is the kerosene being used in a lamp or a heater, as opposed to
something else? In both cases, the amount of water that can dissolve in
kerosene from exposure to even humid air should not be a problem for the
combustion process or in delivery of kerosene from the tank to the
burner.

Now, if you want a long term storage heat source, propane is your
answer. Unless it leaks out, it never goes bad, ever. 16 ouncer will
heat a room for about 7 hours, with an infared heater. Larger tank,
the "20 pounder" gas grill tank goes about 20 hours on a single burner
infared heater. The hissing noise of the burner gets irritating after
a while.

Is your burner the same for the "20 pounder" and the "16 ouncer"?
If so, then the 20 pounder should run 20 times as long as the 1 pounder,
good for somewhere around 140 hours if the 1 pounder is good for about 7
hours.
--
- Don Klipstein )