Investor Presentaiton

Additional Information M MARATHON Non-GAAP Financial Measures This presentation contains certain non-GAAP financial measures. Reconciliations to the nearest historical GAAP financial measures are included in the Appendix to this presentation. These non-GAAP financial measures are not defined by GAAP and should not be considered in isolation or as an alternative to net income attributable to MPC, MPLX or ANDX, net cash provided by (used in) operating, investing and financing activities, Speedway income from operations or other financial measures prepared in accordance with GAAP. Distribution coverage ratio is the ratio of DCF attributable to GP and LP unitholders to total GP and LP distributions declared. Certain forecasts were determined on an EBITDA-only basis. Accordingly, information related to the elements of net income, including tax and interest, are not available and, therefore, reconciliations of these forward-looking non-GAAP financial measures to the nearest GAAP financial measures have not been provided. Additional Information and Where to Find It In connection with the proposed transaction, a registration statement on Form S-4 has been filed with the SEC and includes a preliminary consent statement/prospectus. INVESTORS AND SECURITY HOLDERS ARE ENCOURAGED TO READ THE REGISTRATION STATEMENT AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, INCLUDING THE PRELIMINARY CONSENT STATEMENT/PROSPECTUS AND, WHEN AVAILABLE, THE DEFINITIVE CONSENT STATEMENT/PROSPECTUS THAT WILL BE PART OF THE REGISTRATION STATEMENT, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. The final consent statement/prospectus will be sent to unitholders of ANDX. Investors and security holders will be able to obtain these documents free of charge at the SEC's website, www.sec.gov, from ANDX at its website, http://ir.andeavorlogistics.com, or by contacting ANDX's Investor Relations at (419) 421-2414, or from MPLX at its website, http://ir.mplx.com, or by contacting MPLX's Investor Relations at (419) 421-2414. Participants in Solicitation MPLX, ANDX, MPC and their respective directors and executive officers and other members of management and employees may be deemed to be participants in the solicitation of consents in respect of the proposed transaction. Information concerning MPLX's directors and executive officers is set forth in its Annual Report on Form 10-K for the year ended Dec. 31, 2018, which was filed with the SEC on Feb. 28, 2019. Information concerning ANDX's directors and executive officers is set forth in its Annual Report on Form 10-K for the year ended Dec. 31, 2018, which was filed with the SEC on Feb. 28, 2019. Information concerning MPC's executive officers is set forth in its Annual Report on Form 10-K for the year ended Dec. 31, 2018, which was filed with the SEC on Feb. 28, 2019. Information about MPC's directors is set forth in its Definitive Proxy Statement on Schedule 14A for its 2019 Annual Meeting of Shareholders, which was filed with the SEC on March 14, 2019. Investors and security holders will be able to obtain the documents free of charge from the sources indicated above, and with respect to MPC, from its website, https://www.marathonpetroleum.com/Investors/, or by contacting MPC's Investor Relations at (419) 421-2414. Additional information regarding the interests of such participants in the solicitation of consents in respect of the proposed transaction are included in the registration statement and consent statement/prospectus and other relevant materials filed with the SEC. 3

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