Gasoline futures rose for the first time in seven days as frigid temtures caused refinery shutdowns from Newfoundland to Louisiana. Valero Energy Corp. (VLO) ’s Memphis refinery in Tennessee had a instruments freeze and units trip offline, a person familiar with operations said. Phillips 66 (PSX) had an electrical issue at its Westlake plant in Louisiana, according to a regulatory filing. Korea National Oil Corp.’s site in Come-by-Chance, Newfoundland, is trying to restart after an island-wide power failure over the weekend, company spokeswoman Gloria Slade told CBC News. “The concern over some of the refinery issues we’ve seen as a result of the brutally cold climate across the continent has led to buying in the refined products,” said Andrew Lebow , a senior vice president at Jefferies Bache LLC in New York. Gasoline for February delivery rose 2.05 cents, or 0.8 percent, to $2.6665 a gallon […]