It's been long said by most people that to get 0W-anything, one would need Gr IV and V base stocks in major amounts. I'm not sure if this is true anymore. Petro Canada's 0w30 is for sure Gr III, and it uses a reasonable amount of moly. I've seen shelf space and sprice tag reserved for NEW Castrol GTX 0w30- of which I can find no reference to online. It seems to me that it would nearly be impossible for the blenders of Honda and Toyota's 0w20 to turn any kind of profit at the price they sell at, esp. considering the more costly ad pack (500-600ppm moly). Further, that much moly seems to indicate heavy reliance on it for AW protection with the added benefit of friction modification (two birds with one stone). I strongly suspect the Honda and Toyota 0w20s are Gr III+ at best. Who would agree or disagree and why?