I don't really know much about oil, but the following is pretty much always true..
Any oil is better than no oil. Fresh oil is better than old oil.
Beyond that, this thread might help -
http://www.chinariders.net/modules.p...ewtopic&t=4721
On my Lifan when she was new...I warmed it up once w/ the oil it shipped with. Replaced and ran about 50 miles I think, then changed it again. At 500 miles I changed it again. I was planning to change it again around 1500, but she's sat for a bit now, so I'll change it after it warms up the next time I start her up.