Opinions vary on gasoline’s shelf life. Ask ten fuel blenders and you’ll get ten different answers, ranging from one month to one year, and to some degree, because there are so many variables involved, they’ll all be right. For example, because alcohol has an affinity for water, gasoline with a high ethanol content deteriorates quickly, and in some cases may cause problems within a month or two, while straight gas, when properly stored in an airtight container can last for up to a year or more, especially if it’s stored in large quantities. As far as we’re concerned, the most widely accepted figure is that gasoline stored in your motorcycle’s fuel tank has an expiration date of 90 days. After that it goes downhill quickly, and when it does it can create some real problems, ranging from poor performance to plugged jets and injectors. Let it go too long and there’s a real chance you’ll end up stripping, cleaning and possibly replacing most of your fuel system.