Fuel flip-flop: Gasoline prices may top diesel this summer

Its been said that it would never happen, but this summer it may cause motorists do a double-take at the gas pump.

For relatively low gasoline prices? No, U.S. motorists generally expect gas prices to remain in a comfortable (but not cheap) range.

This summer diesel fuel prices may drop below gasoline prices. Currently, regular unleaded averages about $2.05 per gallon, according to a gasbuddy.com survey. Meanwhile, diesel prices currently average about $2.23 per gallon, according to the U.S. Energy Information Administration.