Stefan wrote:
Cessna will offer the 172S Skyhawk with a Thielert turbo diesel
engine

I'd rather say that Cessna is anticipating the difficulty to explain
why they still sell engines with 50 year old technology, once the
pilots start to recognize that there are modern engines around which
burn less than half the fuel.

Are you saying the Thielert turbo diesel burns half the fuel? Wow!!!