This podcast from Aviation Maintenance magazine examines the challenges and demands placed on aviation oils and lubricants by modern aircraft engines, specifically ultra-long-range aircraft. Interviews with representatives from ExxonMobil and Shell Aviation Lubricants highlight the need for high-performance oils with improved thermal stability to prevent coking, which can cause significant maintenance issues. The podcast also explores the use of lubricants in military aircraft, with the US Air Force highlighting the importance of enhanced ester (EE) oils for meeting the demands of advanced engine technologies. Finally, the podcast discusses the future of aviation oils and lubricants, with experts from both ExxonMobil and Shell addressing the potential impact of eVTOLs and the ongoing drive towards decarbonization.