Originally Posted By: Pablo
1) Actually Amsoil has been clear over the years why they get some certs,
They have equivocated upon and evaded the issues.
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Redline has what "independent" certs?
If Redline also avoids independent certs, then they would fall into the same category as Amsoil in that respect. Have they also presented inappropriate test results as surrogates? I've not been particularly attentive regarding Redline.
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2) Which tests are those?
Four ball wear? But you certainly know that. It's common knowledge, certainly. That test is appropriate for gear oil but not engine oil. You know that, too. And yet Amsoil uses it as the cornerstone of their marketing campaign, which I do not find to be confidence inspiring.
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3 and 4 - so do you avoid Redline? Castrol? Royal Purple? I guess, I'm asking if you are consistent, or is this just an Amsoil thing?
I've not been particularly interested in Redline or Royal Purple. If they avoid third party certifications, I would certainly be suspicious. Amsoil is the only company which has come to my attention as going further and presenting deceptive information in the form of irrelevant but official sounding test results.
Castrol, in the form of GC, has made more of an appearance on my radar. API SL rated. Lot's of good "word of mouth" advertising going for it. I've chosen not to use it since the features of SM/GF4 appeal to me.
So no, it's not an Amsoil-hate thing, which is what I think you are asking. Amsoil has, however, dug itself a deeper hole to climb out of regarding my own personal trust in them.