Has anyone compared UOAs between the two? I hear some people are hesitant to use the 5w-20. I expect the 5w-20 has the better advantage because Ford's specs are higher for this oil and it has some Group III in it where the 5w-30 is all dino.
Others with far more qualifications can elaborate on this but the Motorcraft 5w-20 has a much better basestock than the other weights.
It has been quite impressive in UOAs so far and I confess to being a doubter when these oils debuted.