I think that one thing we can gleen from all of this data is that either oil would do well for an extended change interval of 10,000 miles or less. The re-test of Mobil 1 will give a better idea of wear characteristics, but it does appear to be more durable than the Amsoil.
I do wonder what kind of friction reduction each oil offers. Is one more 'slick' than the other? That would be some useful info, although I'm dubious if it would be any significant difference - in the lab or on the track...
