by Lisa Gibson (Ethanol Producer Magazine) University of Nebraska Researchers have proven E30 is safe for long-term use in non-flex fuel vehicles. The findings could bolster the push for state- and federal-level low-carbon fuel legislation. — Two researchers from the University of Nebraska–Lincoln are eager to continue sharing their results from a study that evaluated the impact of E30 in 50 non-flex fuel state fleet vehicles. The results: Nothing. Over the course of the one-year study, fueling with E30 instead of E15 showed no change in vehicle adaptability, performance, emissions or fuel efficiency. The research was a partnership between the Nebraska Department of Administrative Services and the university to determine long-term usability of E30 in non-flex fuel vehicles.