Originally Posted By: blackman777
Originally Posted By: hounddog
GM dexos1™
Amsoil is skirting dangerous territory here. They can say their oil MEETS dexos, like Valvoline does, but cannot claim it has been approved by dexos because it has never been tested by the Dexos foundation.
The fact is Amsoil does not have one builder-tested oil. Not one. We only have their word that the oil is as good as claimed, and that is not worth much in my book. (Same goes for Redline whose ATF C+ destroyed my 90s chrysler transmission. They don't carry any OEM tested certifications either.) I apologize if my opinion offends.
No, they can't say it meets DEXOS, because if it MEETS DEXOS, it needs to be licensed.
This is why they use the wording they do:
Originally Posted By: AMSOIL
It is recommended for all domestic and foreign vehicles requiring any of the listed performance specifications:
They are RECOMMENDING it for applications that require DEXOS 1, they are not saying it actually MEETS DEXOS 1.
BIG difference.
With regards to Valvoline, please read:
http://www.valvoline.com/promos/dexos.jsp
Their products are DEXOS "compliant", they meet the DEXOS "specifications".
Note the wording