The idea with the oil was that it might deal better with bigger clearances, like a thicker oil may do. This oil doesn't seem to do that. It's more experimenting than anything. Also, where I live, the chance of temps getting down to freezing is very small, but it can get warm, about 35 Deg C, or 95 Deg F, hence this type of oil.
My biggest problem is I'm not totally convinced about the reliability of these bikes, so the idea is to preserve the engine. I don't think I've exceeded 7000 RPM in 900 miles from new. I've owned a different chinabike, an overhead-cam type, and that seemed fine in over 23000 miles. But hey, that's me, I worry about stuff going wrong.
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