https://www.aviationconsumer.com/aircraftreviews/aircraftstepups/diesel-reset-improved-economics/ https://www.aviationconsumer.com/aircraftreviews/aircraftste..

https://www.aviationconsumer.com/aircraftreviews/aircraftstepups/diesel-reset-improved-economics/ https://www.aviationconsumer.com/aircraftreviews/aircraftste... Data seems to imply that the diesel engine lifecycle cost is slightly better now than conventional engines, so electing for a diesel replacement instead of a conventional engine overhaul can make sense... but it's a razor thin difference. If you made leaded fuels more expensive-- more airfields are going to want to move to UL94, and more people at overhaul time are going to go the diesel path, and the problem will gradually get better.