On Mon, 25 May 2015 14:12:22 -0700 (PDT), True North wrote:

Johnny...Johnny..
Stinky asked me about the 6 gallon "tank"....
I have a couple of 20 liter (or 5 US gallon) cans that I use up in the fall.
Earlier I talked about the boat's built in tank that holds about 15 'merican gallons.
That is the gas I burn up in the spring.
Clear enough for you or do I have to get your new recruit, Dickson, to explain it?

Just follow the given advice. It sounds like you're confusing yourself.

It's easy...old gas is bad gas.
--

Guns don't cause problems.
Gun owner behavior causes problems.