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Old 07-09-2013, 05:36 PM   #112
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Join Date: Sep 2003
Chapter/Region: MWSOC
Location: Minneapolis, MN
07 WRX LTD Wagon
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Sorry, I was away for an extended holiday weekend. I'll also apologize for the previous confusion and incomplete comments on my part, it'll teach me to post too fast without looking closely at the results.

I'm still perplexed. Dennis is right, the additives look off and so does the viscosity. Your 13,743 mi UOA of Amsoil Euro looks right, both for viscosity and additive levels. This 17,726 mi UOA looks like a more typical GF-5 synthetic than a low-SAPS European HD 5w30. Look at the Moly, Boron, Calcium, Zinc and Phosphorous levels, they're all substantially different. Combine that with the unlikely eventuality that Amsoil's quality base stocks sheared by 25% and I still think something smells.

I'm going to guess that either Amsoil mis-labeled your oil, and you got something like XL or Signature Series xw-30 in a Euro-Series bottle, or Blackstone mixed your sample up with someone else's. Most likely the latter. I'll echo Dennis' advice, call Amsoil's tech department and ask them about the additive levels (and viscosity). Maybe ping Blackstone too, let them know that the two samples are supposed to be the same oil.
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