Hi Doug,
Do you know if the UOA programme in the USA was performed with the SL or SM version?
Another issue I have with the current version is that the PDS no longer lists the heavy-duty VW 503.01 spec, though they still print it on the back of the bottle. My guess is they are using more group 3 oil in the US version, as all the oils I've seen that meet the VW 503.01 are not group 3, but PAO/Esters. Also, they no longer list the pour point temp like they used to...