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Goodyear Tire & Rubber Co. said Thursday it earned $52 million, or 23 cents a share, in the fourth quarter, compared with a loss of $358 million, or $2.02 per share, a year earlier.

Ryder System’s board approved a 2-cent increase in its quarterly dividend, to 23 cents a share.

ORLANDO, Fla. — Uncertainty about the life cycle of key emission control components and higher maintenance costs have emerged as the top concerns fleets have with 2007 heavy-duty diesel engines, maintenance and equipment heads at several major carriers said here.

Westport Innovations said Tuesday that Wal-Mart Stores will introduce four liquefied natural gas-fueled Peterbilt 386 trucks at its distribution center in Apple Valley, Calif.

Visteon Corp. said it sold some of its non-core underhood and remanufacturing facilities to Centrum Equities. Terms were not disclosed.

Karmak Inc., a software supplier for the trucking industry, said it has released a major update of its Legend business management system, designed solely for the heavy-duty trucking industry.

Volvo Trucks North America said Monday it will offer a heavy-duty engine made by Cummins Inc. that is certified for 2010 emissions standards for its Volvo VN Class 8 trucks, extending an existing agreement between the two.

Diesel engine maker Cummins Inc. said Friday its fourth-quarter profit rose to $198 million, or $1 a share, from $189 million or 94 cents, a year ago.