Quick Answer
Ethanol fuel is not recommended for long-term storage due to its tendency to break down and lose potency over time, which can lead to fuel system corrosion and engine damage.
Fuel Stability Issues
Ethanol fuel, which typically contains 10% to 15% ethanol and 85% to 90% gasoline, is prone to phase separation and degradation when stored for extended periods. When ethanol separates from the gasoline, it can leave behind a mixture of water and sediment at the bottom of the fuel tank. This can cause fuel system corrosion and clog fuel lines, leading to costly repairs.
Long-Term Storage Considerations
To minimize the risks associated with long-term ethanol fuel storage, it’s essential to use a high-quality fuel stabilizer and follow the manufacturer’s instructions for mixing and storing the fuel. A fuel stabilizer can help prevent phase separation and degradation, but it’s not a guarantee against all issues. For generator storage, consider using a fuel with a higher ethanol content, such as E85, which is less prone to phase separation. However, E85 is not compatible with all engines, so consult the manufacturer’s recommendations before switching fuel types.
Storage Best Practices
When storing ethanol fuel for long periods, it’s crucial to maintain a clean and dry storage environment. Store the fuel in a well-ventilated area, away from direct sunlight and heat sources. Use a fuel tank with a tight seal to prevent contamination and evaporation. Consider storing the fuel in smaller quantities, such as 5-gallon containers, to reduce the risk of prolonged storage. Always follow the manufacturer’s instructions for fuel storage and handling.
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