I like Bill's idea of not being skimmed. Although I am fortunate that it has not happened to me, Brian has had it happen twice so far. I tend to use credit at the pump (if I have to) BUT, the majority of the time, I only fill up at places that allow me to pump and pay inside after I pump. They are getting harder and harder to find though but they get my business most of the time.
For those that do specifically budget for fuel, it is actually a great idea. Almost like a savings account so to speak. In the end, you might just be able to fill your boat up one or two more times per year. Especially if you budget 100 bucks one week and only use 80. That adds up in just a few short weeks.
Thanks for the idea Aaron.