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<blockquote data-quote="JD8" data-source="post: 3931395" data-attributes="member: 24">Which tests were you speaking of?&nbsp; Post a link if you could.&nbsp;&nbsp; Back 20 years ago, there was a significant difference.&nbsp; Now?&nbsp; The upper tier brands have caught up.&nbsp; So for me, Ecoboost motors tend to shear oil pretty bad, which is why I started doing some homework when I bought my first one.&nbsp;&nbsp; Granted this is an older test, but I use Pen Ultra on everything now except the Turbo Buick.&nbsp;&nbsp; But there are more than few brands I&#039;d use, because even Amazon basics, Supertech, and Kirkland oils are that much better than what we had 20 years ago.&nbsp; [ATTACH=full]333083[/ATTACH]Ultra showed to have a similar additive pack to Amsoil as well.&nbsp; In addition, surprisingly, Magnatec, and Quaker State Ultra Durability tested well in UOAs.&nbsp; The thing is that Amsoil has great marketing, and it&#039;s obviously a great product, however if your OCIs are ~5K or even 10K, then for me, I didn&#039;t see the stripper glitter, because just about any top tier oil can get you there no problem.&nbsp; However, 10K+ OCIs?&nbsp; Ok, Amsoil or something of the like.&nbsp; But as someone said....lots of preference out there.&nbsp;&nbsp; I dare anyone to say Amsoil or Redline in some of those Subaru boy&#039;s groups..... man they love their Rotella.</blockquote>

[QUOTE="JD8, post: 3931395, member: 24"] Which tests were you speaking of? Post a link if you could. Back 20 years ago, there was a significant difference. Now? The upper tier brands have caught up. So for me, Ecoboost motors tend to shear oil pretty bad, which is why I started doing some homework when I bought my first one. Granted this is an older test, but I use Pen Ultra on everything now except the Turbo Buick. But there are more than few brands I'd use, because even Amazon basics, Supertech, and Kirkland oils are that much better than what we had 20 years ago. [ATTACH type="full"]333083[/ATTACH] Ultra showed to have a similar additive pack to Amsoil as well. In addition, surprisingly, Magnatec, and Quaker State Ultra Durability tested well in UOAs. The thing is that Amsoil has great marketing, and it's obviously a great product, however if your OCIs are ~5K or even 10K, then for me, I didn't see the stripper glitter, because just about any top tier oil can get you there no problem. However, 10K+ OCIs? Ok, Amsoil or something of the like. But as someone said....lots of preference out there. I dare anyone to say Amsoil or Redline in some of those Subaru boy's groups..... man they love their Rotella. [/QUOTE]

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