Diesel markets are entering their most stressful stretch of the year as record prices, thin inventories and disrupted supply flows collide across the Americas. In this episode of the Oil Markets Podcast, Jeff Mower speaks with Janet McGurty, Kauanna Navarro and Carlos Castillo about how constraints in Russia and the Middle East have pushed US Gulf Coast refiners into the role of global swing supplier, why Brazil is relying more heavily on US and Indian cargoes, and how limited refinery spare capacity leaves markets with little room for error.