SAN ANTONIO, Texas - Valero Energy Corp., the largest U.S. oil refiner, said it plans maintenance at 12 of its 18 refineries this year, temporarily slowing fuel production.
Valero operates 16 refineries in the United States with capacity to process about 2.34 million barrels of oil a day, or almost 14 percent of the nation's total.
The plans include the company's Lima, Ohio, facility, where a 26-day project is to begin in the third or fourth quarter.
The work originally was scheduled for March.
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