Personally I don't think it matters a hoot how much nitro you use when running in. In fact 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.
The break in is the most critical part of an engine's life which is why the higher oil content is desireable. Once it's run in then you can use whatever you like but 18% oil might shorten its life a bit.
Downunder you have to stay consistant with the information you are giving in order to have the same results. The first quote you made in a thread yesterday. The second quote you made this mourning at least here in the US it's mourning.
