That's really weird. Their data sheet doesn't tell you that info anyway. Most oil data sheets that I have seen don't have that information.
I think you could get that info from Blackstone Labs, who had probably done an oil analysis (unused) on most of the oils on the market. If they haven't, a guy could spend $25 and send them a sample of virgin oil. The used oil analysis would still be pretty close on additives, as most aren't "used up".
