I learned in miscellaneous instructions from oldest to newest wankel engine + readed the test report of wankel engine by Peter Chinn and what i can do it with older wankel engine as here:

Keep oil percentage hight until 25%, best with castor oil to keep tight against leakage and better lasted moving parts.
Run the engine between 5% and 15% nitro. Keep rich mixture and prevent overheated engine.

But i readed about the new version wankel engine from OS, they has replaced glow plug R with glowplug F (for 4 stroke engine) as i can think the compression ratio are improved to keep glowplug glowing and rpm range are same as older wankel engine. The percenteage are reduced to 18% and the wankel engine can use both castor oil or syntetic oil, may be improved material to run at pure syntetic oil.

I am waiting at the wankel engine as i won in E.b.a.y + i ordered the newest wankel engine from Hong kong then i can compare with both engines when i am talking about use and maintenance of the wankel engine.

Here in RCU are wankel engine less wrote and not much to get information from wankel owner, same in other web sites..[]