This may be old news, but I didn't realize that Valvoline no longer has DEXOS approval on their 5w-20 advanced full synthetic, not that it matters with my vehicles (I don't own any GM). I only noticed after comparing the new packaging to an older jug I had in my stock. I checked the Valvoline and DEXOS approval websites and verified it. I guess 5w-20 is a rather redundant grade, considering that 0w-20 is spec'd for most newer vehicles these days. FYI.