I would have to say the best way to save yourself from paying the price at fuel pumps is to drive the company vehicle ...which I do.
use water, veggie oil on your car lol. I saw videos on youtube that show you can do it without ruining your car, I'm not sure if its a prank, seems legit, anyway just my thoughts, just youtube and you'll see what i mean.
Hey, I do that all the time. Especially when the gas hand is slowly gravitating toward the E on my dashboard.
Another Tip: This is for all you "agressive" drivers out there, you know who you are. Speeding, hard braking or taking off like a bat out of "hell" - could costs you an extra 12 to 82 cents a gallon. Take your time, you could save a life - maybe be your own.