Just limit yourself to putting only a gallon at a time into your tank. There's always a little gas left in the nozzle from the last customer, and if you shake it well when you're finished you can always get a few more drops out. You should be able to get several percent more gas for your money if you follow this suggestion. You will have to make a few more stops to fill your tank though.

No comments from you other old-timers about shaking your nozzle, please [g].