Quote Originally Posted by Reptile View Post
To my understanding, Mobil has the only fully synthetic ATF that is comparable to Dexron......as I read it, Valvoline has the Mercon type F synthetic. I have read no GM information mentioning that Dex 6 is either a blend or fully synthetic. So with that being said, a few searches didn't turn up any reliable information regarding what the specific ingredients are.
I'd imagine that's closely guarded.
DEXRON®-VI ATF

GM fluid is merely a synthetic blend. Meaning not full synthetic.