While some engines are somewhat finicky about lube, most in fact are not. This Duratec 3.5/3.7 engine series is not at all picky about brand/grade of lube; they pretty much wear easily regardless what's in the crankcase (within reason, of course). If not for the internal water pump, these would be 400k-mile+ engines easily.
As for wear, this engine is right in line with expectations for the exposure.
Curious why the short OFCI? These have IOLMs; what did it indicate? My 3.5L Taurus is typically around 10k miles for an OFCI. Did it indicate a change or was this premature on purpose?