| | Retail Gasoline Prices by Grade by Formulation |
| | . |
| | Colorado, Regular |
| | . |
| | Conventional |
| | Date | | Areas | | RFG Areas | | Average |
| | 05/12/08 | $3.612 | $3.612 |
| | 05/05/08 | $3.484 | $3.484 |
| | 04/28/08 | $3.482 | $3.482 |
| | 04/21/08 | $3.412 | $3.412 |
| | 04/14/08 | $3.284 | $3.284 |
| | 04/07/08 | $3.247 | $3.247 |
| | 03/31/08 | $3.195 | $3.195 |
| | 03/24/08 | $3.139 | $3.139 |
| |
| | Colorado, Midgrade |
| | . |
| | Conventional |
| | Date | | Areas | | RFG Areas | | Average |
| | 05/12/08 | $3.727 | $3.727 |
| | 05/05/08 | $3.598 | $3.598 |
| | 04/28/08 | $3.594 | $3.594 |
| | 04/21/08 | $3.530 | $3.530 |
| | 04/14/08 | $3.400 | $3.400 |
| | 04/07/08 | $3.363 | $3.363 |
| | 03/31/08 | $3.311 | $3.311 |
| | 03/24/08 | $3.257 | $3.257 |
| |
| | Colorado, Premium |
| | . |
| | Conventional |
| | Date | | Areas | | RFG Areas | | Average |
| | 05/12/08 | $3.839 | $3.839 |
| | 05/05/08 | $3.708 | $3.708 |
| | 04/28/08 | $3.704 | $3.704 |
| | 04/21/08 | $3.640 | $3.640 |
| | 04/14/08 | $3.509 | $3.509 |
| | 04/07/08 | $3.470 | $3.470 |
| | 03/31/08 | $3.420 | $3.420 |
| | 03/24/08 | $3.365 | $3.365 |
| |
| | Last Updated 5/12/2008 |