David Friedman, an auto expert with the non-profit organization, said he would propose that requirement Friday during a House Financial Services Committee on government aid to the automakers.
Such a link would provide a return on return on taxpayer investment, strengthen the industry, reduce U.S. oil dependence and help mitigate global warming, the union said in a news release Thursday.
Automakers and other concerned entities testified before a Senate panel Thursday.
"U.S. automakers are promising Congress they will make better cars and stay competitive," Friedman said. "But Congress can't just take their word for it and cut a blank check. If the automakers say they can make more fuel efficient cars with the money, they ought to be required, by law, to deliver on that promise."
Notable deaths of 2014 [PHOTOS]
GM recalls 221,000 Cadillacs and Impalas