To PB or not to PB, that is the question: Whether ’tis nobler to endure the pings and knock of inadequate octane in our airplanes’ engines or to rise up and add lead to suppress them. //

In 2021, the only fuels with lead are avgas and racing fuels. In a recent report by the National Academies of Science, Engineering and Medicine, researchers used all of the correct buzz phrases, such as avgas is the biggest polluter of lead, can be inhaled, etc. But they still have no data to back up their suppositions. They just know that it sounds bad.