Thanks for the additional information. Everything newer seems to be Rotax now. Except there was one guy who had a Corvette engine in his Cessna. Other pilots were talking about how it has so much torque his rudder isn’t big enough to compensate.

Hopefully in 5 or 10 years, everything will be electric!

Just today I learned that the fuel Cessnas use has lead in it, because the engines were developed when lead was in all gasoline and they have not found it worthwhile to certify all of those tens or hundreds of thousands of planes with new engines.

In fact, I was at a fly-in today and there were several Cessnas that were 60 and 70 years old. no unleaded fuel, and no added ethanol, either.