Yes, everything I've been reading here says Motorcraft 5w20 is great oil. However, I hear the same about Havoline and, at least until tomorrow, you can go to AdvanceAuto (I think that is the store) and get it by the case for under a buck and a quarter a bottle (includes $2 rebate).
A few cents between them does not make much difference really and I'm pretty sure Havoline would do great to 5000 mile OCIs under normal conditions. Since both these oils have had great UOAs, I wonder if the Motorcraft, being a blend, would do better out to maybe 7500 mile intervals?
A full synthetic is good for extend drains of say around 10,000 miles and a Havoline or similar quality dino up to 5,000. Does it make sense to say a very good blend like Motorcraft falls somewhere in-between? Anyone have thoughts on this?