| | Retail Gasoline Prices by Grade by Formulation |
| | . |
| | Chicago, Regular |
| | . |
| | Conventional |
| | Date | | Areas | | RFG Areas | | Average |
| | 01/12/09 | $1.966 | $1.966 |
| | 01/05/09 | $1.866 | $1.866 |
| | 12/29/08 | $1.687 | $1.687 |
| | 12/22/08 | $1.732 | $1.732 |
| | 12/15/08 | $1.725 | $1.725 |
| | 12/08/08 | $1.652 | $1.652 |
| | 12/01/08 | $1.777 | $1.777 |
| | 11/24/08 | $1.932 | $1.932 |
| |
| | Chicago, Midgrade |
| | . |
| | Conventional |
| | Date | | Areas | | RFG Areas | | Average |
| | 01/12/09 | $2.067 | $2.067 |
| | 01/05/09 | $1.970 | $1.970 |
| | 12/29/08 | $1.795 | $1.795 |
| | 12/22/08 | $1.837 | $1.837 |
| | 12/15/08 | $1.829 | $1.829 |
| | 12/08/08 | $1.762 | $1.762 |
| | 12/01/08 | $1.888 | $1.888 |
| | 11/24/08 | $2.039 | $2.039 |
| |
| | Chicago, Premium |
| | . |
| | Conventional |
| | Date | | Areas | | RFG Areas | | Average |
| | 01/12/09 | $2.167 | $2.167 |
| | 01/05/09 | $2.071 | $2.071 |
| | 12/29/08 | $1.895 | $1.895 |
| | 12/22/08 | $1.939 | $1.939 |
| | 12/15/08 | $1.928 | $1.928 |
| | 12/08/08 | $1.864 | $1.864 |
| | 12/01/08 | $1.986 | $1.986 |
| | 11/24/08 | $2.142 | $2.142 |
| |
| | Last Updated 1/12/2009 |