This doesn't make sense. On the pds for syn blend revised on 2/2/17 it states ** Dexos 1 but not including 5 quart jugs. Two formulas for two different sizes?
Basically they're prepping their packaging for the next generation Dexos spec. None of their blends will meet it (nor will anybody's for that matter). They're starting by changing the 5 quart jugs. The individual quarts are soon to follow. Expect other manufactures to follow suit.