Is it claimed to be meet/exceed dexos1 or is it actually dexos1 certified? I lean towards the former, and the Valvoline site seems to indicate the same thing. Most dexos1 licenced oils not only have the actual logo, but they list the licence number on the label. Nothing from Ashland shows up on the June 1, 2012 dexos1 list. Their site also prominently displays their marketing bulletin claiming that federal law disallows GM from requiring one to use dexos1 licenced oils in GM vehicles.