All 5w20 oils that meet Ford's spec have a significant amount of Group III in them. If you consider Group III to be "synthetic," then, yes, Pennzoil is a blend. They just choose not to market it that way. Conoco's Hydroclear 5w20 and Motorcraft 5w20 are the exact same oil. Ford chooses to market it as a syn blend; Conoco doesn't.