Earlier this decade, East Coast refineries found it cost-effective to ramp down their crude imports and turn to the price-advantaged U.S. shale oil they could rail in from the pipeline-constrained Bakken or send up by tanker from the crude-saturated Gulf Coast. Things changed, though. New southbound crude pipelines out of the Bakken came online, the ban on most crude exports was lifted — providing a new outlet for Texas crude production — and the economic rationale for railing or shipping in domestic crude to PADD 1 refineries withered. Now, things have changed again. Most important perhaps, is that the price spread between WTI and Brent has widened, and once more it can make financial sense for these refineries to revert to crude-by-rail out of the Bakken and to shipping in crude on Jones Act tankers from Corpus Christi and other Gulf Coast ports. Today, we discuss these recent trends, what’s driving them, and how long they might last.