Foreign Oil Displacement Act of 2010 - Amends the Internal Revenue Code to: (1) allow a tax credit for investment in a carbonaceous fuels facility; (2) allow a new 30% tax credit for investment in a carbonaceous fuels conversion facility; and (3) exempt from the manufacturer's excise tax on fuels carbonaceous fuel or any portion of a blend that is carbonaceous fuel. Defines "carbonaceous fuels conversion facility" as a facility for producing fuels from nonconventional sources using coal, including peat and any byproduct (including synthetic gas) or chemical that is from a coal, culm, or silt preparation facility and that contains fixed carbon derived from coal.