MPLX LP to Announce 2013 Fourth-Quarter and Full-Year Financial Results Jan. 29

FINDLAY, Ohio, Jan. 2, 2014 - MPLX LP MPLX, a master limited partnership formed by Marathon Petroleum Corporation MPC, announced today that it will host a conference call on Wednesday, Jan. 29, at 2 p.m. EST to provide an update on company operations and to discuss 2013 fourth-quarter and full-year financial results, which will be released earlier that day.

MPLX participants will be Pam Beall, president, and Don Templin, vice president and chief financial officer. The call will be hosted by Tim Griffith, vice president, Finance and Investor Relations, and treasurer.

Interested parties may listen to the conference call on MPLX's website at http://www.mplx.com by clicking on the "2013 Fourth-Quarter Financial Results" link in the "News & Headlines" section. Financial information, including the earnings release and other investor-related material, also will be available online. Replays of the conference call will be available on the company's website through Wednesday, Feb. 12.

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About MPLX LP

MPLX is a fee-based, growth-oriented master limited partnership formed in 2012 by Marathon Petroleum Corporation to own, operate, develop and acquire pipelines and other midstream assets related to the transportation and storage of crude oil, refined products and other hydrocarbon-based products. Headquartered in Findlay, Ohio, MPLX's assets consist of a majority equity interest in a network of common carrier crude oil and products pipeline assets located in the Midwest and Gulf Coast regions of the United States and a 100 percent interest in a butane storage cavern located in West Virginia. For additional information about the company, please see our website at http://www.mplx.com.

Investor Relations Contacts:
Beth Hunter (419) 421-2559
Geri Ewing (419) 421-2071

Media Contacts:
Angelia Graves (419) 421-2703
Brandon Daniels (419) 421-3127