The national average for a gallon of regular self-serve gasoline has declined nicely the last month or so, and could fall to $3.40/gal by Thanksgiving Day. The part that is tough to chew isn't the turkey that many Americans will be eating, rather the fact that the national average hasn't ever been higher on Thanksgiving than where it will likely be this year- around $3.43/gal.

The national average stood at $3.34/gal last Thanksgiving Day, and could be 10c/gal higher than that this year. It's something that may surprise many Americans, given that gasoline prices have edged lower in previous weeks.

California, for example, has seen a whopping 77c/gal drop in just the last four weeks. That is among the largest, fastest declines in their history, but even California may set a Thanksgiving Day price record as prices remain slightly higher than last year, even after their dramatic fall.

Nearly half of U.S. states may set new records for highest gasoline prices on Thanksgiving day, while the other half aren't as likely to set records. The states more likely to set records for most expensive Thanksgiving Day at the pump: Arizona, Connecticut, Idaho, Maine, Massachusetts, Michigan, New Hampshire, New Jersey, New Mexico, New York, Pennsylvania, Ohio, Rhode Island, Vermont, and Utah.