How can you tell if your gasoline has gone bad?

Signs of Bad Gasoline

Gasoline can degrade over time, becoming less effective and potentially damaging your generator or other equipment. Check the fuel for a stale or unpleasant odor, which is often a sign of oxidation or contamination. You can also look for cloudiness or sediment, which indicates water or particle contamination. Gasoline that has been stored for too long can separate into different layers, with the lighter components rising to the top and the heavier components sinking to the bottom.

Storage and Handling Tips

To prevent gasoline from going bad, store it in a cool, well-ventilated area away from direct sunlight and heat sources. Keep the container tightly sealed and away from flammable materials. If you’re using a generator, make sure to follow the manufacturer’s recommendations for fuel storage and handling. Typically, you should store gasoline in a container with a capacity of 1 gallon or less, and use a fuel stabilizer to prevent degradation. Some examples of fuel stabilizers include Sta-Bil and Sea Foam, which can be added to the fuel at a ratio of 1:10 to 1:20.

Checking Gasoline Expiration Dates

Not all gasoline is created equal, and some types are more prone to degradation than others. If you’re using a gasoline-powered generator, check the label for the “ethanol blend” percentage. Ethanol blends can be more prone to degradation than pure gasoline, especially if the blend is high (e.g. E15 or E85). Always check the expiration date or the “shelf life” label, which is usually indicated by a “use by” or “use before” date. Typically, gasoline has a shelf life of 6 to 12 months, depending on the storage conditions and the type of gasoline.