MPLX LP to Announce 2015 Third-Quarter Financial Results Oct. 29

FINDLAY, Ohio, Sept. 29, 2015 - MPLX LP (NYSE: MPLX), a master limited partnership sponsored by Marathon Petroleum Corporation (NYSE: MPC), will host a conference call on Thursday, Oct. 29, at 2 p.m. EDT to discuss 2015 third-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 Tim Griffith, vice president and chief financial officer. Other MPLX executives will also be present during the call, which will be hosted by Geri Ewing, director of Investor Relations.

Interested parties may listen to the conference call on MPLX's website at http://www.mplx.com by clicking on the "2015 Third-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 Wednesday, Nov. 11.

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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 99.5 percent 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 with approximately 1 million barrels of natural gas liquids storage capacity.

Investor Relations Contacts:
Geri Ewing (419) 421-2071
Teresa Homan (419) 421-2965

Media Contact:
Chuck Rice (419) 421-2521
Brandon Daniels (419) 421-3127

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