I topped off my tank today and was surprised when it only took $20 to do it. I honestly didn't pay attention to the cost per gallon. I knew I was gonna buy it and that's the station I most often buy at so the price was really not a consideration to me. I really didn't even pay that close attention to how much I put in but it was somewhere beteen 8 and 9 gallons I think, for sure not 10 gallons so perhaps it's down here as well.