An filling station attendant pumps gas Tuesday, March 20, 2012, in Portland, Ore. Oregon's average gasoline price has hit $4. Retail gasoline prices in the U.S. are now averaging $3.846 per gallon, according to auto club AAA, Wright Express and Oil Price Information Service. A gallon of regular is the highest ever for this time of year. The national average has risen by 57 cents per gallon since January.