Gas prices soar higher again this week. National retail fuel price averages Price Change from last week Regular gasoline/gallon .23 ? .06 Diesel fuel/gallon .82 ? .16 Regional regular gasoline prices Price Change from last week East Coast .19 ? .03 -New England .17 ? .02 -Central Atlantic .19 ? .02 -Lower Atlantic .21 ? .03 Midwest .19 ? .11 Gulf Coast .13 ? .04 Rocky Mountain .11 ? .02 West Coast .46 ? .07 -California .54 ? .08 Source: Energy Information Administration, 3/10/08