[ROCKLOBSTER]

I remember when you could store gas over the winter with no problems at all for using the next spring.

You still can, as long as you seal the tank.

[Openurmind]

There is no way to completely seal a tank. Just like with tires, the alcohol molecules will leak between the gasket(s) molecules. This is why they pushed Nitrogen for tires, The molecules are larger than rubber molecules and cannot go around them. So they maintain pressure longer. Same with gasket materials.

[brianl703]

I store my riding mower in the garage. I use E10 gas in it. It always starts up in the spring, even though I do not use Stabil or drain the fuel.

People who store their OPE outdoors where it gets rained and snowed on may have worse results...