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Clean Energy Fuels Corp. reported its first-quarter loss widened, in part due to one-time costs.

Natural gas producers are scaling back output, boosting historically low prices, the Wall Street Journal reported.

CINCINNATI — There is strong interest among corporate fleet executives in converting from diesel-powered trucks to those that run on compressed and liquefied natural gas as more fueling stations are built and more powerful engines are available, according to panelists at an industry meeting here last week.

YRC Worldwide Inc. and Arkansas Best Corp.’s less-than-truckload unit reported losses in the first quarter, although three other major carriers reported marked improvement during the period.

Frito-Lay on Tuesday said it is adding 67 compressed natural gas trucks to its private fleet, the New York Times reported.

Apache Corp., an oil and gas exploration and production company, has opened a public-access compressed natural gas fueling station in Tulsa, Okla.

LOUISVILLE, Ky.—Truck and engine manufacturers at the Mid-America Trucking Show here declared natural gas the victor in the industry’s search for a practical alternative fuel to diesel, saying they could have three different types of natural-gas engines by 2013 and a nationwide network of 100 fueling stations that offer it by 2014.

LOUISVILLE, Ky. — The nation’s largest annual trucking show here last week illustrated just how much the U.S. truck market has been reinvigorated, as more-prosperous equipment manufacturers eagerly chased the business of solid, stable motor carriers.

Clean Energy Fuels Corp. reported a $20.9 million loss, or 29 cents per share, in the fourth quarter, compared with a profit of $13.8 million, or 18 cents a share, in the year-earlier period.