I haven't had the need yet to have extra gas along for the generator, but may in the future so I have 5 gallons of gas should I need it. I have also considered taking along an empty 5 gallon gas can so I could park on the street and at least get 5 gallons at a station that I am unable to get into with truck and trailer. Of course if I was real low and not sure when the next station is, I would not be opposed to unhooking trailer somewhere and going to get gas with the truck only. I am like others, I don't wait much lower than half on fuel gauge to figure out where we're getting gas.