MPLX LP to Announce 2014 First-Quarter Financial Results May 1

FINDLAY, Ohio, April 1, 2014 - MPLX LP MPLX, a master limited partnership sponsored by Marathon Petroleum Corporation MPC, will host a conference call on Thursday, May 1, at 2 p.m. EDT to discuss 2014 first-quarter financial results, which will be released earlier that day, and to provide an update on partnership operations.

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 "2014 First-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 partnership's website through Thursday, May 15.

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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 partnership, 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
Jamal Kheiry (419) 421-3312