In another thread, engine reliability has been raised. Some people don’t trust single engined aircraft. So let’s have a quick survey.
What is your experience of engine failure in normally-aspirated aero engines? Express it as engine failure per thousand hours of your flying experience. Limit it to Lycoming, Continental and four-stroke Rotax engines. Perhaps only answer if you have at least 500 hours of flying experience. Of course we are talking about mechanical failure, not fuel a management issues.
Auto conversions, older or minor makes, turbo and injected engines not included.
My experience, for what that is worth, is zero failures per thousand hours.