How Long Is Gas Good For In A Container?

Storing extra gasoline for your car, lawn care equipment, and anything else that may need it is a smart way to stay prepared, both for emergencies and for everyday life. However, if you go to refill a gas tank and find a dusty old container in a corner of your garage or shed, you may find yourself wondering if gas can go bad over time. Unfortunately, some gasoline can begin to degrade after as little as three to six months of storage in a plastic container. The length of time before degradation depends on the type of gas and storage methods, though, and there are some ways to help prolong the life of your gasoline if you realize you are not using it up as quickly as you anticipated.

Regular unleaded gas is the type that will begin to degrade after about three to six months, while premium or high-octane fuel can last about nine months. Diesel gasoline lasts a few months longer, often beginning to degrade around the one-year mark. Times vary due to the difference in greater stability of the volatile compounds in high-octane fuel. Degradation occurs as a result of natural evaporation and oxidation over time. As these processes happen, the gas loses the combustible properties and volatile compounds that make it effective. Using degraded gas can damage your item's engine and cause clogs, but if you think your gas may be degraded, don't just throw out old gas from your lawn mower or storage containers. Safely dispose of it and learn to reduce degradation going forward.

No matter which type of fuel you are trying to store, there are some steps to take to slow degradation and get the maximum storage lifespan. First, you need the right container. Learn about using metal and plastic containers to store gas, and decide which safety-approved option is best for you. Metal containers can help prevent degradation by reducing sunlight exposure, so they are worth considering despite their higher price. You should also keep the container airtight and store it in a cool, dry place, even if you are using a metal container, to reduce evaporation. So, depending on your climate, gasoline may be one of the common things that are a big mistake to store in your garage. To reduce the effect of oxidation, you can also turn to fuel stabilizers. Fuel stabilizers can add months or even a couple of years to your gasoline's lifespan, and combined with the other methods for optimal storage, fuel-stabilized gasoline can be stored for between one and three years safely.

Despite your best efforts, stored gasoline will degrade over time. Whether you are unsure how long a mysterious container has been in your shed or you just want to check the condition of your gasoline before using it, there are a few things to look out for. If the color looks different, especially darker, or if you see sediment in the container, then the gas has likely degraded. Scent is another giveaway of the condition of your gas. If you detect a sour or just unfamiliar smell, then your gasoline has gone bad and should not be used.