There is a thread running on this subject on Pelican Parts 911 technical forum right now. Wade through all the pages and decide for yourself, but Brad Penn (sounds like an actor) seems the oil of choice.
http://forums.pelicanparts.com/showthread.php?t=367300
Great stuff if you can get it however for those of us not in the USA, we need to look at other choices.
ACVW engines have a lot in common with bike engines. I use Mobil 1 Delvac in everything I own. Yes this is diesel oil but read this and decide for yourself:
http://www.calsci.com/motorcycleinfo/Oils1.html#Oil
While you are thinking about oil, think about the filter. If you do not have a filter, install one. I use only Purolator Pure 1 filters for the following reasons:
http://www.calsci.com/motorcycleinfo...tml#OilFilters
YMMV
Robert