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Diesel continued to soar last week, jumping 22.6 cents to put the national average retail price at an unprecedented $4.723 a gallon, according to the Department of Energy.

The <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />U.S. trade deficit expanded in April for the second straight month following seven declines, as exports dropped to the lowest level in almost three years, the Commerce Department said Wednesday.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

Emissions from cargo ships would be reduced under legislation that passed the Senate Environment and Public Works Committee, the Associated Press reported.

Diesel engine maker Cummins Inc. said it named Tom Linebarger to replace Joe Loughrey as the company’s president and chief operating officer, effective Aug. 1.

U.S. consumer confidence fell to a 28-year low in May, according to the Reuters/University of Michigan monthly consumer sentiment index released Friday.

Manufacturing activity in the Chicago region improved in May but showed contraction showed for a fourth straight month, the National Association of Purchasing Management said Friday.

Federal regulators disclosed a sweeping probe into U.S. oil-market trading and said they were expanding surveillance of energy markets, the Wall Street Journal reported Friday.

Consumer personal spending rose 0.2% in April, the Commerce Department said Friday.

Minnesota Gov. Tim Pawlenty (R) signed a bill that will require diesel sold in the state to contain 20% biodiesel content by 2015, the Associated Press reported.