The lawsuit, filed Friday in U.S. District Court, escalates a long-running dispute over soybean-based biodiesel that pits fuel users and some vehicle makers against Minnesota farmers and green groups.
Last July, Minnesota began requiring that diesel fuel sold here contain 10 percent bio- diesel, the highest mandate in the nation and double the earlier 5 percent level. Some industries objected, noting some engine warranties don't cover biodiesel fuel blends above 5 percent.
Read more: http://www.twincities.com/localnews/ci_27959849/industry-groups-sue-block-minnesota-biodiesel-mandate