My wife does a lot of shopping at Kroger. A LOT. So much so that she had earned a dollar off per gallon. So...she had me follow her to Kroger for a "tandem fill up". You know...when you are permitted a one time fill up at a discounted rate so you fill one vehicle up...then set the pump nozzle on the ground...move up and then bring in the second vehicle....stop and continue pumping? Yeah...I learned that deep discounts only work per use...like the time my wife had 60 cents off per gallon and I topped off my MOTORCYCLE...yeah...two gallons and then when she tried to fill up later that day expecting her 60 cent per gallon discount...she was presented with a 3 cent off per gallon discount. Lesson learned.