Gasoline and diesel fuel prices continue to climb in May.
The U.S. Department of Energy, in its weekly report May 12, listed the average nationwide retail price for a gallon of regular gasoline at $3.72.2 a gallon. The average price for a gallon of diesel fuel was $4.33.1. The West Coast — California, in particular — led the nation in both fuel categories.
California has its own gasoline reformulation program, which is more stringent than the federal requirements.
This article originally appeared in the June 2008 issue.