Help with oil change specs

[sbergman27]

Originally Posted by TheSilkySmooth

Mobil 1 5w-30 is not full synthetic just 30%, Castrol Syntec has no synthetic in it, Valvoline Synpower has no synthetic in it - what "full synthetic" are you running?

If you are going to ask such a question, it seems like you might post a few links to sources which support your position.

I see this all the time. "This or that vendor's synthetic oil isn't really synthetic." But rarely do I note any sort of reference to credible sources making a clear statement on the matter, based upon clear evidence.

Besides that, I have to wonder why there's such a focus upon what's thought to be in the oil, and such a lack of focus upon how, empirically speaking, the oil performs relative to other oils.

That's why people become so weary of oil threads. There's always a lot of bluster by folks who imply they have the facts in hand. But rarely is there any actual meat to the claims.

-Steve