Propane: less power for given weight of fuel, but fuel essentially never goes bad. Burns cleaner than gasoline.

Gasoline: more power for given weight of fuel, more available than propane. Even stabilized, gasoline doesn’t last more than three years in storage, and I’ve been sticking to rotating it annually.


The generator I have now is gasoline only; when I replace it I’ll almost certainly get a dual-fuel model.

My gas generator could be converted to run on propane, and propane/dual-fuel generators can be converted to run on natural gas.