Hello, new here. I tried searching, calling AcDelco asking dealships and as many people as I can but still not getting a clear answer. I’m wondering what the difference is between AcDelco 10-9243 Vs AcDelco 10-9394. They both say Dexron VI but one says full synthetic on the front and the other doesn’t. I thought all AcDelco Dexron vi was full synthetic? Any help I’d greatly appreciate,TIA.