I agree with Guy there. 300 to even 500 gallons sound pretty good to me. I don't own one but my Grandfather does and he loves it. I wish I could have one. I would probably be able to go a whole month without having to fill up. I get about 28 mpg highway in my Honda Odyssey. I can't really complain with that. Take what you can get and fill at a 1/4 tank. Stop whining. Or just trade it.