| | Retail Gasoline Prices by Grade by Formulation |
| | . |
| | Washington, Regular |
| | . |
| | Conventional |
| | Date | | Areas | | RFG Areas | | Average |
| | 06/30/08 | $4.367 | $4.367 |
| | 06/23/08 | $4.350 | $4.350 |
| | 06/16/08 | $4.325 | $4.325 |
| | 06/09/08 | $4.241 | $4.241 |
| | 06/02/08 | $4.146 | $4.146 |
| | 05/26/08 | $4.032 | $4.032 |
| | 05/19/08 | $3.893 | $3.893 |
| | 05/12/08 | $3.808 | $3.808 |
| |
| | Washington, Midgrade |
| | . |
| | Conventional |
| | Date | | Areas | | RFG Areas | | Average |
| | 06/30/08 | $4.484 | $4.484 |
| | 06/23/08 | $4.464 | $4.464 |
| | 06/16/08 | $4.435 | $4.435 |
| | 06/09/08 | $4.358 | $4.358 |
| | 06/02/08 | $4.264 | $4.264 |
| | 05/26/08 | $4.153 | $4.153 |
| | 05/19/08 | $4.012 | $4.012 |
| | 05/12/08 | $3.923 | $3.923 |
| |
| | Washington, Premium |
| | . |
| | Conventional |
| | Date | | Areas | | RFG Areas | | Average |
| | 06/30/08 | $4.591 | $4.591 |
| | 06/23/08 | $4.569 | $4.569 |
| | 06/16/08 | $4.537 | $4.537 |
| | 06/09/08 | $4.462 | $4.462 |
| | 06/02/08 | $4.377 | $4.377 |
| | 05/26/08 | $4.254 | $4.254 |
| | 05/19/08 | $4.113 | $4.113 |
| | 05/12/08 | $4.025 | $4.025 |
| |
| | Last Updated 6/30/2008 |