I also had 3 engine failures in my old Toyota GTi.
Bought a brand new VW - engine burned about a liter of oil per 100 km and dispersed blue smoke all over. After a few arguments, I got a free replacement.
It has now run smoothly for 3 years.
It is just a matter of either driving something old or being a bit unlucky.
I could imagine, that some GA aircraft are not kept to the same standard as those from a major airline.
Regards
Michael