Originally Posted by 1wrxtra
This most recent sample (the Amsoil 5w30 I posted above in post #92) I took correctly so those results should be correct unless Blackstone fudged something up. The previous test (the second UOA in post #69) was sampled from the pan. It was a new pan though, had never been used before that so it wasn't contaminated from old oil.
Was that what you were looking for or did I misunderstand your question?
You didn't misunderstand my question, I asked it poorly.
I was actually referring to the previous UOA which you did take from the pan, I thought maybe some RT6 or something got mixed in, thus thickening the sample. If the pan was brand new, I wouldn't expect any contamination issues. This latest one is so thin it makes me wonder if it's lab error, maybe ask Blackstone to confirm the KV100 number. It could also be that they mixed up your sample with someone else's. Gathermethewool's UOA showed 11% shear, which while not great, is much more believable.
The discussion over at BITOG is interesting. Like I said before, this is the oil Amsoil would recommend for a VW 2.0t (GTI/TT/A4), and those things are murder on oil, especially the gen 1 engines (pre-TFSI) they make a WRX look positively kind to oil. So the idea that this low-SAPS oil would obviously not be up to the task of a WRX seems strange to me.
I found this discussion at BITOG (link
) which seems to indicate that the Euro manufacturers screwed up yet again when translating requirements to the North American market. Apparently the low-SAPS oils aren't up to long drain intervals in gasoline cars due to ethanol and sulfur content in North American fuel, though they do fine in diesels.