Los Angeles gasoline gained against futures on speculation that plant repairs in Southern California will cut supplies in the market. Gasoline’s discount narrowed as Air Products & Chemicals Inc. (APD) said it was preparing for maintenance at the Carson, California, hydrogen plant “in coordination with a key customer.” The Carson complex, which supplies hydrogen to refineries in the Los Angeles area to fuel process units, is expected to restart in mid-February, Art George, a company spokesman in Allentown, Pennsylvania , said by e-mail today. California-blend gasoline, or Carbob, in Los Angeles strengthened 1 cent versus futures traded on the New York Mercantile Exchange to a discount of 5 cents a gallon, according to data compiled by Bloomberg at 4:20 p.m. East Coast time. The prompt-delivery price jumped 6.05 cents to $2.6271 a gallon, a two-week high. Tesoro Corp. (TSO) ’s Wilmington plant, part of the company’s 363,000-barrel-a-day Los Angeles […]