This 5,000-hour study of seven plastics and nine fuel blends is designed to help automakers and Tier 1 suppliers speed design and create better systems for oxygenated fuels. It includes long-term fuel compatibility data for commonly used engineering plastics in applications such as fuel sender units, rollover valves, outlet covers and fuel injector components and confirms the importance of long-term testing to aid understanding of how plastics and fuels interact. It also confirms the many performance benefits of Celcon® and Hostaform® acetal copolymers (POM) at fuel tank temperatures and Fortron® polyphenylene sulfide (PPS) at engine compartment temperatures.