Here in Europe the turbodiesels seem to be more popular as an alternative. But it's still pretty hard to get them approved. And I believe they require a full re

Here in Europe the turbodiesels seem to be more popular as an alternative. But it's still pretty hard to get them approved. And I believe they require a full replacement instead of a rebuild every few years. I think it's highly preferable because many airports don't really want to be selling avgas anymore, and this will only become more of a problem as it's phased out. There's also a huge price difference.