The Obama administration's proposed fuel economy standards for 2025 are unfairly tilted in favor of the three U.S. automakers and put their foreign-based rivals at a disadvantage, according to a House Republicans report released on Friday.

According to the report written by the House Oversight and Government Reform Committee staff, the standards are also based on an "overly optimistic" outlook of American consumers' willingness to buy hybrid and electric cars. The committee is chaired by California Republican Darrell Issa.