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U.S. diesel prices roared past gasoline in September, reversing the historic pattern because rising demand for diesel, coupled with the weak dollar, has led refiners to export the fuel even as their use of refinery capacity is at a four-year low, according to market experts.

NEW YORK — U.S. freight carriers are reaping benefits from the weaker dollar as export shipments climb within North America and overseas.

U.S. truck tonnage rose 2% in April from a year ago, the sixth straight increase in monthly volumes, according to a preliminary report from American Trucking Associations.

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.