I agree, something very close to that. I idle a ton. I’ll leave it on a lot so it’s cool for our summers (Las Vegas). The idle should be very low. I’ve heard others say three or more, and I just don’t agree. It’s very very minimal.Hmmmm, tough question. From one who has idled it a lot, I can say this. You could maybe go a day if you had a full tank of gas. Maybe 1/4 tank after 4-5 hours? So let's say in my experience, maybe under 1 gallon per hour.