I found the above link on Bad Example. You enter your zip code, and find the cheapest gas prices as of the night before. It won't protect you against a sudden change that morning, but it gives you a starting point. And if, like me, you fill up infrequently, it could save you a lot. I find that I lose track of the price if I've been able to avoid stopping in a few weeks (yes, I said WEEKS - I live just over a mile from work, and, except for fresh foods, I do a lot of online shopping).
Tags = Money