Hi
I was one of the posters on the maillist, I also found this article on additives and ZDDP -
http://www.performancemotoroil.com/t...additives.html
which also suggests it's not such a big deal perhaps. For example:
"The zinc in your oil comes into play only when there is actual metal-to-metal con tact within your engine, which should never occur under normal operating conditions"
So presumably as long as you're not starving the oil from parts of your engine, it should be okay.
It seems unlikely to me that oil companies would make changes that would end up causing damage to customers engines. I know we're talking about 'high performance' engines here, but I would imagine that your typical oriental 'buzz bomb' isn't too dissimilar in terms of loads per component.
Internet scare perhaps?