>Can you follow this process and store the gas? Yes. People with old motorcycles/engines don't like putting ethanol gas in them. This is how they remove the corn in areas where they don't sell real gasoline. Ethanol binds aggressively with water (which is why it's so terrible for engines). Pour a gallon of gas into a cup of water already in the container (1 part water to 16 parts ethanol gas). That's usually enough water. More water is fine if you think it's heavy on ethanol and want to get all of it. You just have to shake it well, let it settle until the gasoline at the top is crystal clear (overnight). Then siphon the water/ethanol mix off the bottom. The layer of water/ethanol at the bottom and pure gas at the top will be highly visible in a clear container, and there will be more water/ethanol than the original water you added. Add the gas to the water, don't add the water to the gas. This will help get the water into the gas more thoroughly before it separates. You also want to shake it for a good 30 seconds, longer is better. The proper way to do it is with a big glass bottle + a siphon, an ethanator, or a separatory funnel, but any clear container and a siphon will do as long as the container material won't be melted by the gas. With old gas you also need to filter out any gum that's built up in the gas. What's left over has a much longer shelf life. If it's really old gas, the gasoline itself can still go bad, but you'll have gotten the ethanol, gum, and water the ethanol has sucked into the gas out. Edit this guy on jewtube has a pretty well thought out way to do it: https://www.youtube.com/watch?v=opPZD8-2fLk