Generator Fuel Types: Which is Most Reliable Long-Term?

Characteristics of Generator Fuel Types

When it comes to choosing a fuel type for long-term generator storage, several factors come into play. Diesel fuel, propane, natural gas, and gasoline are common options. However, each has its unique characteristics that affect reliability and performance. Diesel fuel, for instance, has a high energy density of approximately 13,700 BTU/gallon, making it a more efficient option. In contrast, gasoline has an energy density of around 12,600 BTU/gallon.

Long-Term Storage Considerations

To ensure reliable long-term generator performance, proper fuel storage is crucial. Diesel fuel, in particular, is less prone to degradation over time due to its low moisture content and higher viscosity. This makes it easier to store and transport. For example, diesel fuel can be stored for up to 12 months without significant degradation, whereas gasoline can break down more quickly. Proper storage involves maintaining a consistent temperature, avoiding exposure to light, and sealing the fuel tank to prevent contamination.

Fuel Type Comparison

Propane and natural gas are also viable options for generator fuel. However, they require more complex storage and handling systems. Propane, for instance, requires a separate storage tank and regulator system, which adds complexity and cost. Natural gas, on the other hand, is typically stored in compressed form, requiring specialized equipment and infrastructure. While these fuels offer advantages in certain situations, diesel fuel remains the most reliable long-term option due to its simplicity and ease of storage.