There's a lot more to piston engine oil than you might think. The lubrication requirements of slow-turning direct-drive Continentals and Lycomings are quite modest, but aircraft engine oil needs to do lots more than lubricate. We also depend on it to clean, cool, seal, and protect against corrosion. It takes a complex package of additives to do all this. In this webinar, Mike Busch offers a guided tour of the complexities of aircraft engine oil, and offers recommendations on selecting the best oil for your engine.