On May 1, 2018, the U.S. Department of Energy’s (DOE) Vehicle Technologies Office (VTO) and Bioenergy Technologies Office (BETO) announced a joint multi-topic funding opportunity for $12 million as part of the Co-Optimization of Fuels and Engines (Co-Optima) initiative. This collaborative research and development effort supports the research of fuel and engine innovation that maximize vehicle performance and fuel efficiency, and is accelerating the introduction of affordable, scalable, and sustainable biofuels and high-efficiency, low-emission vehicle engines. The current funding opportunity will prioritize research projects in the following areas: batteries and electrification; materials; technology integration and energy efficient mobility systems; energy-efficient commercial off-road vehicle technologies; and co-optimized advanced engine and fuel technologies to improve fuel economy. Concept papers are due May 29, 2018, and full applications are due July 13, 2018, through the Office of Energy Efficiency and Renewable Energy (EERE) Exchange website.