Oil Sands Energy Security Act of 2010 - Amends the Energy Independence and Security Act of 2007 to repeal the prohibition against any federal agency contract for procurement of an alternative or synthetic fuel, including a fuel produced from nonconventional petroleum sources (such as oil sands), for any mobility-related use (other than for research or testing) unless the contract specifies that the lifecycle greenhouse gas emissions associated with the production and combustion of the fuel supplied under the contract must, on an ongoing basis, be less than or equal to greenhouse gas emissions from the equivalent conventional fuel produced from conventional petroleum sources.
Makers a conforming amendment to the National Aeronautics and Space Administration Authorization Act of 2008 to repeal the exception to such prohibition National Air and Space Administration (NASA) contracts to purchase a generally available fuel that is not an alternative or synthetic fuel or predominantly produced from a nonconventional petroleum source, if certain conditions are met.