The top-rated Generac XT8500EFI 8,500-watt generator has an 8-gallon tank and a run time ranging from 9 to 15 hours. That means running it for two days straight can take more than 40 gallons of ...

If you ration what you use during a storm (say, unplug the refrigerator for extended periods), then you can justify a smaller generator. Which Generator Is Right for You? Danny Lipford, host of ...