Tesoro Corp. buys struggling oil refinery in North Dakota

BISMARCK, N.D. (AP) — Texas-based Tesoro Corp. has bought an oil refinery in southwestern North Dakota that has struggled to turn a profit due to a dramatic fall in demand and low diesel prices. North Dakota-based MDU Resources Group Inc. and Indianapolis-based Calumet Specialty Products Partners LP spent $430 million on the Dakota Prairie Refinery … Continue reading Tesoro Corp. buys struggling oil refinery in North Dakota