Quote:
Originally Posted by Pescakl1  So to sum up, ASL Amsoil 5W30 oil (API rated but not certified) is not that good for engines with catalyc converter and therefore should not be use (at least not for a long time) on
the Rogue.
On the other hand, the XLF Amsoil 5w30 oil (part of the XL-7500 line?) is API certified and therefore can be use on the Rogue.
Am I right?
Do you know if the XLF Amsoil 5w30 is a full synthetic oil (group IV) or a 'false' synthetic oil (Group III)?
I noticed on the Amsoil website that they proudly
say that the ASL oil is "100% synthetic motor oil" but for the XLF oil they only say "Extended Life synthetic motor oil", no 100% synthetic on this page.
They are all so vague that I become suspicious on everything now. Bad for business not to be 100% honest. | Yep, thats certainly the what I think is being said??
Your summation is my summation...
Anymore, I don't really know what to believe about
Amsoil....thats why I was going with the Royal Purple
so I could quit guessing and assuming...just trying to
end the confusion...
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