Our average of how long a generator ran, over various loads, on a full tank of gasoline or diesel fuel, a 20-pound tank for propane-based portables, or a 250-gallon propane tank for stationary models.

It runs on gas and can hold 1.14 gallons at a time. Plus, it's a "super-quiet" generator, which means you don't have to worry about interrupted sleep. "We lost power a week after I received this ...