Gentlemen,

This thread has in fact displayed that most of us have our opinions and that opinions are just that. I do not see the benefit from slamming one anothers posts bordering on insult as being a beneficial addition to the forum.
Be that as it may, I believe that regardless of the method one desires to break in their engines, with care they will all have a nice running engine in the long run. The synthetic users will just take a bit longer than the non-synthetic users. Is anybody absolutly right or wrong? - No I don't think so.
This is a hobby and a fun one, we all know that there is more than one method to achieve an end objective.

Synthetic oil break in or conventional oil break in? The great debate will continue.

Now for my opinion on the subject. I am one of those that subscribes to the synthetic only school of thought. Yes, it takes a bit longer to get a really well seated ring. I also am a firm believer in heat cycling the engine for the first hour or so and running an oil mixture a little richer (32: rather than 50:1) for the first hour or so. I also vary the load on an engine and (on airplane engines) swap props to load the engine or unload the engine and run it at different rpms. I will run the engines at high rpm and light load for a short while and then load it down with a heavier pitch and run a high load and lower rpm's.

My method works for me and that is my opinion from experience.