energy information administration short term outlook april 2005 1 summer motor gasoline figure prices in are projected to remain high at an expected average of 2 28 per gallon for the september season 38 cents above last similar through 2006 monthly peak about 35 may diesel fuel 24 as 2004 primary factor behind these price increases is crude oil costs wti example 37 higher than world demand will continue support and increase competition imports united states additional changes specifications tight refinery capacity can be operating slightly limit supply flexibility adding further pressure on pump reach 9 3 million barrels day this up 8 percent from despite rise