Marathon Petroleum Corporation Launches Share Repurcha.

FINDLAY, Ohio, Feb. 3, 2012 - Marathon Petroleum Corporation (NYSE: MPC) today announced that it has entered into an $850 million accelerated share repurchase (ASR) program under its recently authorized $2 billion share repurchase initiative. The total number of shares to be repurchased will be based generally on the volume-weighted average price of MPC stock during the repurchase period, subject to provisions that set a minimum and maximum number of shares. At yesterday's closing price of $42.56, the total shares to be acquired under the ASR would represent approximately 5.6 percent of shares outstanding at year-end 2011. It is anticipated all repurchases under the ASR will be complete on or before the end of the third quarter of 2012.



About Marathon Petroleum Corporation

MPC is the nation's fifth-largest refiner with a crude capacity of approximately 1.2 million barrels per day in its six-refinery system. Marathon brand gasoline is sold through more than 5,000 independently owned locations across 18 states. In addition, Speedway LLC, an MPC subsidiary, owns and operates the nation's fourth largest convenience store chain, with approximately 1,375 locations in seven states. MPC also owns, operates, leases or has ownership interest in approximately 9,400 miles of pipeline. MPC's fully integrated system provides operational flexibility to move crude oil, feedstocks and petroleum-related products efficiently through the company's distribution network in the Midwest, Southeast and Gulf Coast regions. For additional information about the company, please visit our website at http://www.marathonpetroleum.com.



Investor Relations Contacts:

Pamela Beall (419) 429-5640

Beth Hunter (419) 421-2559



Media Contacts:

Angelia Graves (419) 421- 2703



Forward Looking Statements

This release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995.  These forward-looking statements relate to, among other things, MPC's current expectations, estimates and projections concerning MPC business and operations.  You can identify forward-looking statements by words such as "anticipate," "believe," "estimate," "expect," "forecast," "project," "could," "may," "should" or "would" or other similar expressions that convey the uncertainty of future events or outcomes.  Such forward-looking statements are not guarantees of future performance and are subject to risks, uncertainties and other factors, some of which are beyond the company's control and are difficult to predict.  Factors that could cause actual results to differ materially from those in the forward-looking statements include: further volatility in and/or degradation of market and industry conditions; the availability and pricing of crude oil and other feedstocks; slower growth in domestic and Canadian crude supply; completion of pipeline capacity to areas outside the U.S. Midwest; consumer demand for refined products; changes in governmental regulations; transportation logistics; the availability of materials and labor, delays in obtaining necessary third-party approvals, and other risks customary to construction projects; the reliability of processing units and other equipment; our ability to successfully implement growth opportunities; impacts from our repurchases of shares of MPC common stock, including the timing and amounts of such repurchases; other risk factors inherent to our industry; and the factors set forth under the heading "Risk Factors" in MPC's Registration Statement on Form 10 filed with the Securities and Exchange Commission (the "SEC"). In addition, the forward-looking statements included herein could be affected by general domestic and international economic and political conditions.  Unpredictable or unknown factors not discussed here or in MPC's Form 10 could also have material adverse effects on forward-looking statements. Copies of MPC's Form 10 are available on the SEC website, at http://www.marathonpetroleum.com or by contacting MPC's Investor Relations office.

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