I don't know if there's any truth, about Motorcraft oil being made by Valvoline, or not..This much I do know, it's not a full synthetic oil..It's a blend of synthetic and conventional motor oil, where on the other hand, Motoroils, such as Mobil 1 and Royal Purple, are full synthetic, and if I'm not mistaken, I believe that a full synthetic, from Valvoline is also available, but most recommend, either Royal Purple or Mobil 1 as being the best choices..Personally, I highly recommend Mobil 1...mhanksii said: