I'm not trying to test your experience with engines , so lets keep it civil . The first quote printed in this thread you are talking about running it in (in my book it's the same as breaking in the engine) In the second quote it's obvious you are talking about 'break in'.

Then in the first post you say 'with the rather low oil content of some fuels a high nitro might even be better because you have to open the needle more which means a higher rate of oil flow. ' which I understood you were trying to say low amounts of oil good be good. Or only more oil comes out when the needle is opened wider.

Then in the second post you said 'The break in is the most critical part of an engine's life which is why the higher oil content is desireable ' I understood you were saying higher oil content is better for break in period.

I can only speak for myself and I believe you contradicted yourself or you didn't explain enough for a newbie to understand the difference you were trying to make. Or better yet you were trying to stay in the middle as far as how to break in an engine.

If you could explain further what you mean, maybe I would understand differently from what you typed.