I dumped my fluid the first month. LV is low viscosity. So it's thinner for fuel economy I guess. Someone earlier said thicker If I recall.
You don't have to use motorcraft at all, the fluid you use just has to meet the ford spec and then even if it doesn't ford would have their hands full denying warranty problems. To those of you that think otherwise I feel bad for you. They actually have to prove that the fluid is the problem and simply saying that it's the wrong brand or doesn't meet spec isn't enough of an argument. I can did up some old threads but some of you will either accept that answer or never accept it and the argument will be a waste of my time. Amsoil users have already proved this. A lot of automatic trannies are using LV fluid so it's not an exclusive fluid to Ford or the SHO for that matter.
Anyway one of the few ATF's out there that actually use a true type IV synthetic base stock is Amsoil. The others are a refined hydrocracked petroleum that is marketed at synthetic when it's really not but the big oil companies get away with calling it synthetic.
Read up on group III and group IV/V oils they are different animals and there is no question on superiority when you have the facts.
I can't say I feel or hear any difference in having all synthetics in my car and it's not cheap. Actually when you use the oil and fluid the proper length of time it's actually comparable and the protection is better and I run the piss out of my car so I like it.
Motorcraft fluids have proven to shear or lose viscosity really bad through used oil analysis by 3rd party testing. So I really lost faith in MC after seeing the test data.
Its big in the mustang world where my GT track pack recommended 5w-50 MC synthetic and it sheared to a near 30 weight after only 1000 miles, that's not good. Group IV synthetic base stocks simply won't shear.
