The Diamond Green Diesel Port Arthur plant, which started up in the fourth quarter of 2022, boosted the sales volumes, Valero said. Margins for U.S. refiners remained under pressure during the quarter due to easing demand following the end of the peak summer driving season, a string of storms in the U.S. East Coast that kept drivers off the road, and the relatively high prices at the pump. The 3-2-1 crack spread, a proxy for refining margins, fell around 35% during the July-September quarter. Valero said quarterly refining margins fell 8.2% to $5.41 billion. The San Antonio, Texas-based refiner reported an adjusted net income of $7.49 per share for the three months ended Sept. 30, compared with analysts' average estimate of $7.47. (Reporting by Arunima Kumar in Bengaluru; Editing by Sriraj Kalluvila)