FINDLAY, Ohio, Nov. 15, 2013 - Garry L. Peiffer, president, MPLX LP (NYSE: MPLX), has announced his intention to retire effective Jan. 1, 2014.

Mr. Peiffer was named to his current position in 2012. He also serves on the board of directors for MPLX. Mr. Peiffer will continue in his capacity as a director.

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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.

Investor Relations Contacts:
Pamela Beall (419) 429-5640
Beth Hunter (419) 421-2559
Geri Ewing (419) 421-2071

Media Contacts:

Angelia Graves (419) 421-2703


MPLX Announces Retirement of Garry Peiffer:
http://hugin.info/155038/R/1743439/586486.pdf


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(ii) they are solely responsible for the content, accuracy and originality of the
information contained therein.

Source: MPLX LP via Thomson Reuters ONE
HUG#1743439