Gas for $2.91

I bought gas yesterday morning for $2.91 per gallon. I keep track of my gas expense in a little book in my car, and that's the lowest I've paid since I've been using that particular book starting in March 2012. Although, when I got up by my workplace on the North side, two gas stations there had it for $2.89. However, by the time I got back home last night it was back up to $3.19. For a change I actually got it before it went up.