Bloomberg | Even Old Oil Refiners Get This Disruption Thing Bloomberg Besides warding off the threat of antitrust regulators, that limited overlap represents Marathon's bid to go from regional player to truly national giant. For Andeavor, it would fulfill at one stroke an ongoing process to diversify away from the West ... Big Oil deal creates largest American refinery Texas Billionaire Cashes In As Marathon Grabs Andeavor To Become Biggest US Oil Refiner |