Yep–out at my store too!  I was also told that they would honor the coupon up to a week beyond the expiration date–so there is hope for those of us unable to grab them before they sold out!  Thanks to all of you who emailed me …seems that they underestimated how many people would want a 20% discount on gas 🙂  I would recommending calling your store to confirm and make sure you have the coupon clipped before you toss the ad (or print it from Publix.com)