Detroit, Michigan

Marathon's Detroit refinery was acquired with the purchase of Aurora Gasoline Company by Marathon (then The Ohio Oil Company) in 1959. It is the only petroleum refinery operating in Michigan. The RC14001 certified refinery processes a wide range of crude oils from light sweets to heavy sours, a significant portion of which are Canadian crudes. The refinery has a capacity of 106,000 barrels per day.

Operations include crude fractionation, catalytic cracking, hydrotreating, reforming, alkylation and sulfur recovery. The product mix is composed of gasoline, distillate, asphalt, slurry, propane, chemical grade propylene and sulfur. The refinery produces low sulfur gasoline and ULSD.

In June 2008, the Company began construction on a heavy oil upgrade project at the refinery. The projected $2.2 billion investment will increase its heavy oil processing capacity by approximately 80,000 bpd and its crude refining capacity by 10 percent. The project will add more than 400,000 gallons per day of clean transportation fuels to the marketplace. The project is scheduled for completion in the second half of 2012.

History

The Detroit refinery has been in operation since 1930, when it was owned by Max Fisher and operated as the Aurora Gasoline Company. In 1959, Marathon Oil Company purchased the refinery and since then has continued to improve the facility.

Safety and Environmental Awards

• The refinery is certified as a Michigan VPP site, receiving Rising Star status, and expects to satisfy the requirements for STAR status in the first quarter of 2010.
• Received Responsible Care’s® RC 14001 certification, which recognizes the Company’s commitment to, and the quality of, its health, environmental and safety systems. It is the first facility of any kind in the world to receive the RC 14001 certification.
• Completed a $300 million dollar project in 2005 to meet the Environmental Protection Agency’s new Clean Fuels regulations and to expand the refinery’s processing ability by 35 percent, producing one million additional gallons of cleaner burning, ultra low-sulfur gasoline daily.