Exhibit 21.1

MARATHON PETROLEUM CORPORATION

LIST OF SUBSIDARIES

as of December 31, 2011

	Name of Subsidiary	Jurisdiction of Organization/Incorporation
	Bonded Oil Company		Delaware
	Buckeye Assurance Corporation		Vermont
	Catlettsburg Refining, LLC		Delaware
*	Centennial Pipeline LLC		Delaware
*	Explorer Pipeline Company		Delaware
*	Gravcap, Inc.		Delaware
*	Green Bay Terminal Corporation		Wisconsin
*	Guilford County Terminal Company, LLC		North Carolina
	Hardin Assurance Ltd.		Bermuda
*	Johnston County Terminal, LLC		Delaware
*	LOCAP LLC		Delaware
*	LOOP LLC		Delaware
	Mannheim Terminal and Warehousing Service Company		Illinois
	Marathon Canada Marketing, Ltd.		Delaware
	Marathon Carbon Management LLC		Delaware
	Marathon Domestic LLC		Delaware
	Marathon Petroleum Company Canada, Ltd.		Alberta
	Marathon Petroleum Company LP		Delaware
	Marathon Petroleum Service Company		Delaware
	Marathon Petroleum Supply LLC		Delaware
	Marathon Petroleum Trading Canada LLC		Delaware
	Marathon Pipe Line Company		Nevada
	Marathon Pipe Line LLC		Delaware
	Marathon PrePaid Card LLC		Ohio
	Marathon Renewable Fuels Corp.		Delaware
	Marathon Renewable Fuels LLC		Delaware
	Marathon Renewable Supply LLC		Delaware
*	Mascoma Corporation		Delaware
	Mid-Valley Supply LLC		Delaware
	MPC Investment Fund, Inc.		Delaware
	MPC Investment LLC		Delaware
	MPC Trade Receivables Company LLC		Delaware
	MPL Investment LLC		Delaware
*	Muskegon Pipeline LLC		Delaware
	NEC Ethanol LLC		Delaware

	Niles Properties LLC	Delaware
*	Northern Tier Holdings LLC	Delaware
	Ohio River Pipe Line LLC	Delaware
*	Oil Insurance Limited	Bermuda
	Omni Logistics LLC	Delaware
*	Port Everglades Environmental Corp.	Florida
*	Resource Environmental, L.L.C.	Delaware
	Speedway Beverage LLC	Delaware
	Speedway LLC	Delaware
	Speedway Petroleum Corporation	Delaware
	Speedway Prepaid Card LLC	Ohio
	Speedway.com LLC	Delaware
	Starvin Marvin, Inc.	Delaware
	SuperAmerica Beverage LLC	Delaware
	SuperMom’s LLC	Delaware
*	The Andersons Clymers Ethanol LLC	Ohio
*	The Andersons Marathon Ethanol LLC	Delaware
*	WIP, LLC	Indiana
*	Wolverine Pipe Line Company	Delaware

* Indicates a company that is not wholly owned directly or indirectly by Marathon Petroleum Corporation