Motorcraft oil is one of the best dino oils. The synthetic blend part of the name is marketing hype. If Castrol can get away with calling Group III base stock a full synthetic, then others can call anything similar a "synthetic blend".
Motorcraft oil is made by Conoco. Others in the Conoco that are essentually the same thing include TropArtic, Kendall, and Unical.
The same "pure base" base stock is also used by Chevron (who holds the patent), Texaco, Penzoil, and probably Quaker State who is owned by Penzoil.
The short answer is that Motorcraft oil is excellent stuff.
