If done properly, excess fuel can be stored for several months. Extra fuel can be used in vehicles, lawn equipment, boats, generators and other items. Precautions must be taken when handling and storing fuel and should be stored only when necessary.
How to Store
Excess fuel should be stored in tightly covered metal cans, if possible, to minimize leakage and evaporation. If metal cans are not available, you can use the plastic containers that are specifically made for storing gasoline. Always fill the cans to the top to avoid the risk of air pressure build up.
Carrying extra fuel in a vehicle or storing it in your home is never recommended. Excess fuel should be stored in a cool or shady area. Storing fuel in a separate storage area away from your house or in a detached garage is permissible.
The components of the fuel can change when stored for long periods of time. Stored fuel also can evaporate or oxidize and become rusty. A fuel stabilizer can be added to reduce oxidation.