Environmental Vehicle Fuel Economy Stays the Same in July, 2012 by Gary Kopycinski on August 2, 2012 Gary Kopycinski Author More in Environmental: People Outside Will Be Injured: Severe Thunderstorms Strike Park Forest March 31, 2026 Park Forest Officials Urge Residents to Protect Pipes as Coldest Air of the Season Continues December 14, 2025 Park Forest Workshops Join Global Effort to Prevent Bird Collisions August 21, 2025 ANN ARBOR, Mich.–(ENEWSPF)–August 2, 2012. After a three-month drop, fuel economy of all new vehicles sold in the United States remained unchanged in July, say researchers at the University of Michigan Transportation Research Institute.