Couple misconceptions in this post.
Gas goes bad in two ways.
1. The lighter end hydrocarbons evaporate off, leaving the heavier stuff behind. These lighter end hydrocarbons also are the main octane components, and have the highest vapor pressure. This means they're most likely to escape, and you get reduced octane fairly quickly, even if the fuel will still burn. This can mostly be mitigated with a tightly sealed metal barrier can, which is exactly what it comes in. I did let out a tiny bit of those lighter end hydrocarbons, I may have reduced the shelf life by five minutes. Certainly not 8 years.
2. Gasoline's different compounds separate out and recombine into other compounds, the end of which is no longer gasoline. Think of it like milk souring, it's going to happen no matter how tightly sealed the milk carton is. This is the main issue we have with gasoline going bad and is hugely worse with ethanol fuel, although it effects non-ethanol pump gas as well.
This is where Motomix, Trufuel, etc really shine. They're not just non-ethanol gasoline, they're an alkylate instead of a distillate like gasoline a completely different formulation which doesn't experience the separation and recombination issues of pump fuel. They smell more like carb cleaner than gasoline.
No snake oil.