Originally Posted by Mr_Draco
I don't know how it works out that way but it does.
it's either in your head or your numbers are wrong. filling up less often will not increase your MPG. if your MPG's are staying the same, then your spending the same amount of money. so long as your doing the same amount of driving. you may fill up less often, but your spending more when you fill up. the only way you would save money by filling up less often would be if you could somehow buy 18 gallons of gas for the same price as 14 gallons.