Denver, Colorado-based private equity firm Lariat Partners invested in Offen Petroleum, a fuels, lubricants and logistics services provider operating in Colorado and the Rocky Mountain region. The investment will enable Offen to reach into new markets through greenfield locations and acquisitions. Brian Coffman was appointed president and CEO of Motiva Enterprises, replacing Dan Romasko. Coffman previously served as senior vice president of refining for Andeavor Corp., formerly known as Tesoro.