Dual-Fuel vs. Gasoline Generators: Pros and Cons

Dual-fuel generators run on either gasoline or propane, switchable on the unit. The main advantage is fuel flexibility: propane stores indefinitely without degrading (gasoline needs a stabilizer and should be rotated), and propane is often available when gas stations lose power and can't pump during a widespread outage.

Gasoline-only generators are typically cheaper and slightly more fuel-efficient per hour of runtime, but you're dependent on a fuel source that both degrades in storage and may be hard to get more of during exactly the kind of extended, widespread outage that matters most.

Propane also burns cleaner (less generator maintenance over time) but generally yields somewhat less runtime per equivalent volume of fuel than gasoline.

For an occasional short outage, gasoline-only is fine and cheaper. For hurricane-belt or multi-day-outage-prone areas, the fuel flexibility of dual-fuel is usually worth the added cost.